Ultra Flex Air System features air ducts to provide ventilation

Elite Invisible Sock is the first invisible running sock with the maximum amount of technology in the minimum amount of running sock

The American Podiatric Medical Association (APMA) Seal of Acceptance recognizes products that have been found beneficial to foot health

Ray-Ban ® RB4147 sunglasses are fashionable and bold with larger rounded square lenses in propionate plastic frames which offer maximum sun protection while embracing a chic Hollywood look

This slide features an elevated puffy design

BIRKENSTOCK COTTON TWIST WOMEN'S Size:M Ultra Flex Air System featuresThis casual & soft, skin friendly cotton sock is perfect to be worn with sandals, clogs or shoes! The reinforced toe and heel sections offer lasting comfort by boosting durability and providing the feet with optimum protection. High cotton content for maximum comfort Components: 96% cotton, 2% polyamide, 2% elastane Upper material: Material combination For this sock, a combination of materials was used. You can find more information on our main