![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-3018998.jpg?v=1783967475&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-4357885.jpg?v=1783967476&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-6926857.jpg?v=1783967475&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-8473220.jpg?v=1783967476&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-5003344.jpg?v=1783967476&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-8960493.jpg?v=1783967530&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-4661974.jpg?v=1783967529&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-7083625.jpg?v=1783967477&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-7403634.jpg?v=1783967476&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-2982521.jpg?v=1783967476&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-7238772.jpg?v=1783967476&width=3000)
![[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-ii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-5597734.jpg?v=1783967477&width=3000)
Discover the ULTBIAS difference
This product is available for pre-sale and is currently on the way to our warehouse. The estimated delivery date is 23 October 2026.
Astro & Wanderlust - Part II continues the story, settling deeper into the quiet magic that first enchanted. Astro slows into stillness: a crescent moon lingers in the sky, gesturing towards contemplation rather than change. In Wanderlust, curosity gives awy to quiet mastery with a graceful cat now perched on the moon's curve, resting in steady confidence. Together, they capture a stillness that feels both distant and familiar, wonder settling into something that stays.
About Duo Edition - A4 myCOLLECTION Binders
The Duo Edition is a 2-in-1 binder system for collectors who want maximum storage space without compromising on utility, protection or design. An ULTBIAS original solution, it comes with two individual custom A4 ring binders stored togeter in one shared outer case. In development for almost two years, the innovative design improves the overall management of larger collections by making it easier to access, organize and browse.
The Duo Edition is one of three sizes available in our Custom A4 myCOLLECTION Binder range. It offers the most photocard storage and can fit a total of x90 single-sided sheets of our Custom A4 9-Pocket Photocard Pages, which holds up to 810 photocards across both binders.
Each custom A4 4-D ring binder included is constructed with tough premium board core and equipped with a dual magnet clasp. This enclosure keeps the contents safe and gives the binder its signature box-like structure to ensure it can be stored standing without collapsing. The protective Binder Shield™ prevents pages from sagging when stored upright, supported by custom-engineered reinforced rings that can withstand up to 2kg of weight. Designed for everyday handling, the spine eyelet together with the ventilated holes on the outer case makes it effortless to quickly access and shelf your binder in one quick wobble-free motion.
With no fixed pages, tailor your binder to fit the exact needs of your collection with the flexibility to adapt and change your set up at any time. For the best fit and alignment, choose our archival-safe Custom A4 Pocket Pages.
Care Note
To preserve our myCOLLECTION binders, store away from direct sunlight in a cool, dark space.
Due to the large size of our binders, an order limit has been enforced to ensure your binder(s) arrive safely:
These limits apply to the binders only and pocket pages can still be added to your order.
"It's the perfect way to upgrade from a hobby collector to a full fledged full set collector; from the backboard to protect the pages from bending to the Binder Shield that keeps the pages in place when they're stored upright - this set has it all! I'm so happy with this set, and I recommend this brand to anyone!"
Kenya W.
Made to safely hold more
Big collections shouldn’t require making big compromises. Our Single A4 binder has been carefully sized to fit up to 405 photocards while staying sturdy, protective and easy to use, so you get the most storage possible without it becoming too heavy to handle or flimsy to trust.
Made to fit everything
From posters to sticker sheets, kpop collections go well beyond photocards. Unlike zip binders or collect books, our binders have no fixed pages to give you true flexibility to store and organise everything your collection may include. With over ten available Custom A4 Pocket Pages to choose from, there's a home for every odd inclusion.
Made for lasting protection
Generic office folders weren’t made for collecting. Our binders are engineered inside out for complete long-term protection, beginning with premium materials and finishing with our protective binder accessories included with every binder.
Find the right binder for your collection. Discover the difference between our two signature sizes: Single and Duo Edition.
Shop Single
Single
Fits up to x45 single-sided sheets of our Custom A4 9-Pocket Photocard Pages, which can hold up to 405 kpop photocards in total.
Duo Edition
An ULTBIAS original 2-in-1 binder system. It comes with two Single A4 binders stored together in one shared outer case.
Fits up to x90 single-sided sheets of our Custom A4 9-Pocket Photocard Pages, which can hold up to 810 kpop photocards in total.
Single
Best-Selling Size
Duo Edition
2-in-1 Binder Set
Up to 405 photocards
Photocard Storage
Up to 810 photocards
Up to 45 sheets
Page Capacity
Up to 90 sheets
300 x 350 x 64mm
Binder Dimensions
300 x 350 x 64mm
300 x 350 x 64mm
Outer Case
305 x 360 x 140mm
![[PRE-SALE] A4 BT21 Minini with ULTBIAS - Duo Edition](http://ultbias.com/cdn/shop/files/pre-order-a4-bt21-minini-with-ultbias-duo-edition-7687834.jpg?v=1783470375&width=2000)
![[PRE-SALE] A4 BT21 Minini with ULTBIAS - Duo Edition](http://ultbias.com/cdn/shop/files/pre-order-a4-bt21-minini-with-ultbias-duo-edition-7536517.jpg?v=1783470376&width=2000)
![[PRE-SALE] A4 myUNIVERSE Binder - Part II - Duo Edition](http://ultbias.com/cdn/shop/files/a4-myuniverse-binder-part-ii-duo-259394.jpg?v=1736478682&width=2000)
![[PRE-SALE] Part I - Astro + Wanderlust - Dream Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/duo-edition-astro-wanderlust-version-2-dream-white-807592.jpg?v=1723220532&width=3000)
![[PRE-SALE] Part I - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-i-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-6062146.jpg?v=1762492482&width=3000)
![[PRE-SALE] Part III - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://ultbias.com/cdn/shop/files/pre-order-part-iii-astro-wanderlust-midnight-duo-edition-a4-mycollection-binder-1808312.jpg?v=1784298917&width=3000)
NEW OFFER
Save 25% off each pack of Custom A4 Pocket Pages with the purchase of your A4 binder.
SEE IT IN ACTION
Overall rating: 5.0 / 5 from 9 reviews.
Bought another A4 binder from here before and this is as beautiful as the last one, high quality, well packed to prevent damages in transit. Highly recommend buying this item!
[PRE-ORDER] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder
I’ve never once been disappointed in the quality of these binders! I love how much I can fit in them and the fact that it’s so easy to organise everything with the index tabs. Highly highly recommend !
Part II - Astro + Wanderlust - Dream Duo Edition - A4 myCOLLECTION Binder
Die Binder waren super schnell da und echt gut verpackt. Ich hatte Angst dass das Paket bis nach Deutschland Dellen oder so bekommt aber es ist echt in einem super Zustand angekommen. Echt gut verarbeitet und sieht wunderschön aus. Aktuell reicht es für meine PC Sammlung aber ich hab es direkt meinen Freunden empfohlen. Echt super und kaufe gerne wieder einen Binder hier. Die Hüllen halten einfach nur super drinnen. Besser gibt es nicht!
[PRE-ORDER] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder
Love the duo binders and how the designs change colour in the light, heaps of storage for my growing collections.
Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder
These binders are just the best quality. I love knowing that all of my pcs are safe and displayed in a cute way. The sets of binders look amazing together. Highly recommended 🫶
Part II - Astro + Wanderlust - Dream Duo Edition - A4 myCOLLECTION Binder
It so beautiful!! I love it so so much!!
[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder
LOVE LOVE LOVE! Will always buy my collection needs from UltBias!
[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder
Great quality and design! Love love my bts collection in it
[PRE-SALE] Part II - Astro + Wanderlust - Dream Duo Edition - A4 myCOLLECTION Binder
![Customer photo review of [PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder](http://images.loox.io/uploads/2025/12/11/Hndwi8hs1_mid.jpg)
Very sterdy and beautiful binder!
[PRE-SALE] Part II - Astro + Wanderlust - Midnight Duo Edition - A4 myCOLLECTION Binder
The albums are beautiful and very sturdy! I may move my some of my A5 Prism Platinum collections to this beautiful A4 binder, Cathy! :)
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
This is seriously an amazing design - I love how pretty it looks in my space, and how sturdy it is on top of the look!
first off the ONLY reason I rate this as 4 stars instead of 5 is because its so big! So much bigger than I thought it would be and doesn't fit on any shelves I have. The one it's sitting on has nothing above it so there is space. However with that being said I still absolutely love this, it's my first ever duo binder and it looks absolutely stunning in person and the quality feels amazing and it feels STURDY in or outside of the outer box. I don't feel any worry when it comes to my pcs because I'm very confident that they're safe. The holo designs and the little cut outs are such a cute little touch. Definitely love this binder for sure, I just wish it was a tad shorter in height. <3 Still recommend tho!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
its gooood
Originally ordered a single binder as you can see but loved it so much I absolutely had to get the double pack as I expanded my collection!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
Really love the design. I’ll be ordering the black binder as well.
I love these binders and I can't wait for more designs and colors to come out in the future and I love the slip covers
Another wonderful purchase that I am in love with!! I keep coming back. This was my 5th Binder purchase from Prism Platinum! And I will.be back for more!
These are absolutely beautiful and so well made! They hold so many pages without damaging anything or bending and warping the pages. My favorite binders I own!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
The quality is truly amazing! I own the black and the white duos, and I can’t wait until they release in more colors because I want to put my entire collection in these!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
I had been seeing ads for this binder all over Instagram for quite some time now, and I'm so glad I finally decided to purchase. I was a bit concerned about this binder being made of cardboard since I've only used plastic binders in the past, but the quality is so amazing. It's super thick and sturdy and I'm not worried about my pcs getting damaged at all. I love the inclusion of the backboards and binder shield.
The binders are BEAUTIFUL!! I love them sm
Fantastic quality as always
Astro + Wanderlust - Dream Duo Edition - A4 myCOLLECTION Binder
I have so many of these binders now and they’ve been my favorite. I’m going to stick to them now and in the future. They’re sturdy and just physically beautiful on display. A great way to keep your collection safe.
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
These are so pretty, very sturdy, and look so great on my shelves!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
I’m a novice collector that let a lot of my postcards and photo cards pile up in some box, but keep them in these binders are the best decision/purchase I’ve made. The binders a beautiful and they’re excellent quality, I no longer worry about my collection being damaged in the box I kept them in anymore. I just love to flip through them! Would recommend these binders to anyone who loves to collect!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
The attention to detail on these binders is fabulous. Well worth the money!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
I can't get over how beautiful these look on my shelf!
I ordered a couple of these to help with my ever-growing collection, and they are absolutely beautiful. I hope to buy more in the future!
I love my new binders a bit big for my shelf but I knew that before hand. I was able to fit so much into them. I have them laying sideways nothing has gotten damaged and it's so easy to pull the binder out with out movi g anything else out of the way
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
LOVE these binders. they’re big enough to fit all the inclusions i want, so im using them for my ot8 ateez and skz collections! gonna be buying more to fit everything i have!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
I love this! It’s so nice and durable. Highly recommend. Perfect for my Ateez collection❤️❤️
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
Not normally an A4 binder girly, but I bought these to sort out my bigger and obscurely sized inclusions and I’m loving it
Beautiful box and binders! Exactly what I’ve been looking for!
I LOOOOVE these binders. The white or black choices can fit into any aesthetic really. I got these to house my Hueningkai collection, as it already outgrew my single A5 binder. :') The binders are just gorgeous, sturdy, and makes me enjoy my collection more. They are pricey, but they will last. I think it will be a good investment for anyone serious about pc collecting. :)
I love love love this binder set. Pictures don’t do it justice… it is so beautiful in person. It is bigger than I thought (in a great way) and I am so excited to have it for my collection.
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
LOVE THESE! they are beautiful! i've got quite a few A5 binders from PP and the quality is truly unmatched.. i'm so happy they've carried that quality over to their A4 collection too! :)
I love this set! I’m so glad that there’s an A4 version. The binders are well made and sturdy. I love the design, and would like it even more if the pages were included!
The duo binder is gorgeous and I lov the holographic designs. I’ve only ever used A5 binders and I’m pleasantly surprised at how much this A4 binder holds in comparison. Now I want the white version too lol.
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
I wanted this binder duo for so long! I still have to get more pages but I truly am impressed with the quality and durability of the binders and the pages already! I have over 1000 PCs in my collection and it will make a nice home for all of them!
Open a luxurious box to find these luxurious binders housing your collection!
Duo Edition – Astro + Wanderlust – Version 1 – Midnight Black
