Rubber sole Lace closure Responsive Boost midsole Snug, sock-like fit, Lace closure Adidas Primeknit textile upper adidas celebrates the 60th anniversary of the participation of visually impaired athletes in the Paralympic Games. These Ultraboost 20 Shoes incorporate elements of Braille into their design. They're made with Parley Ocean Plastic as part of adidas' commitment to end plastic waste.