The Zero Wooler is an innovative barefoot-style shoe that offers an entirely different kind of walking experience.Quality: Designed in Switzerland. Made in Portugal on century-old looms. REACH certified colour dyes. Learn more about the making of our shoes.Materials: Natural Portuguese mulesing-free sheep wool upper & inner lining. Durable rubber blend sole & genuine top-grain Nubuck. Includes cotton laces.Care: Machine washable with “wool” program (30° C, gentle spin) with light, wool detergent. Air drying is recommended. Repair kit is available for increased longevity.Specifications: Heel drop: 0mm, Arch height: 0mm. 4mm rubber sole, large footbed, inner sole with wool covering. The "high" edition offers additional ankle support while the "low" edition is low-cut.