Springy Boost™ cushioning puts comfort under every step in a heritage running shoe that doubles as a street sneaker made with recycled fibers and materials. The Primeknit upper wraps your foot in breathable support, while built-in stabilization technologies and recycled rubber keep you moving day and night. Cushioning: absorbs impact and distributes weight for consistent, buoyant comfort under each step Pull-on sock upper with adjustable lacing cage Primeknit upper wraps your foot in flexible, ultralight support Removable, cushioned insole allows for custom orthotics Boost cushioning rebounds quickly from every step, stride or jump Torsion® System construction stabilizes each step for heel-to-toe comfort Stretchweb energy-returning rubber base flexes underfoot for a dynamic ride Continental™ Rubber tread ensures reliable ground grip in wet or dry conditions Textile and synthetic upper and lining/rubber and synthetic sole Imported Primeblue products contain high-performance recycled materials made in part with Parley Ocean Plastic® Fibers made from Parley Ocean Plastic are sourced from upcycled plastic waste intercepted from remote islands, shorelines, waters and coastal communities