It's hard to believe that adidas' signature Boost technology took the stage way back in early 2013. Within these five years, the German brand's pebble foam cushion unit has exploded onto the market thanks to the Ultra Boost footwear line. To celebrate this massive milestone, we've compiled a list of the five most valuable Ultra Boosts of all time.

Parley For The Oceans x adidas Ultra Boost
To start the list off, we present to you the ultra rare Parley For The Oceans x adidas Ultra Boost. This isn't the general release pair that dropped last year, but the original collaborative model between the two brands. Skilfully crafted from plastic bottles and nylon from gill nets, this innovative sneaker has paved the way to the future of sneakers and footwear as a whole. adidas' Tailored Fiber Technology technique was used throughout for a flexible, lightweight wear, but due to the overall difficulty of the manufacturing process, only around fifty pairs exist in the wild, making its average resale price of £3500 absolutely worth it.

Ronnie Fieg x adidas Consortium Ultra Boost Mid 'Friends & Family'
You can look, but you definitely can't touch – well, maybe you can if you're a friend or family member of New York City designer Ronnie Fieg. Launched at the end of 2016, the Ronnie Fieg x adidas Ultra Boost Mid 'Friends & Family' is as clean as it gets. Donning a crisp white colourway throughout, the silhouette rests atop a full length Boost midsole, and the design is rounded off by a metallic silver heel counter that gives the sneaker a unique yet understated vibe. We're not exactly sure how many of these were made, but unless you have £2700 to spare, you have no chance of copping these.

Hypebeast x adidas Ultra Boost Uncaged
Back in 2015, Hypebeast teamed up with adidas for a collaborative Ultra Boost to commemorate their tenth anniversary. Painted in a simple black and white colourway, the shoe was truly revolutionary, incorporating an NFC chip in the tongue which was the first in its kind for a footwear product. This allowed users to tap their phone and enter a specially created microsite which hosts a diverse range of exclusive content. With a resell price averaging at around £1050, this Ultra Boost Uncaged is for diehard fans of the streetwear website.

Sneakersnstuff x adidas Consortium Ultra Boost 'Tee Time'
Inspired by golf, the Sneakersnstuff x adidas Consortium Ultra Boost 'Tee Time' combines a timeless original with state-of-the-art functionality as a nod to the classy outdoor sport. Featuring a striking mix of black and white Primeknit across its upper, SNS embroidering along the heel strap, and a woven label placed at the tongue, these clean creps will set you back around £880.

Wood Wood x adidas Ultra Boost 1.0
And last but not least we present to you the Wood Wood x adidas Ultra Boost 1.0. Made in collaboration with the Copenhagen-based streetwear label, these sneakers are a lesson in minimalist sneaker styling. Replacing the UB's conventional Three Stripes with a trio of ribbons, these were heavily inspired by astrophysics and the gravitational waves the followed the Big Bang. As weird and wacky as that sounds, we think its average resale price of £720 absolutely worth it.
What do you think of our list of the five most valuable adidas Ultra Boosts of all time? Do you agree with it or do you think there should be a few more worthy mentions? Let us know in the comments below, and as always, keep it locked here at The Sole Supplier for the latest and greatest in sneakers! In related news, be sure to check out our list of the most hyped sneakers of 2018!