The Boost story is one that’s still being written. Be a part of the next chapter in these adidas Pureboost 21 Shoes. Responsive Boost cushioning keeps you comfortable 24/7. Recycled materials are part of adidas’ commitment to end plastic waste. What’s more future-focused than that? This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is Primeblue yarn.