Features: Style: Wading Socks Colour: Black Material: Exterior: 3.5mm 85% Yulex® natural rubber/15% synthetic rubber by polymer content Lining: (upper) 100% recycled polyester jersey; (footbed) 95% nylon/5% spandex Natural rubber is from sources that are Forest Stewardship Council® certified by Preferred by Nature™ Fold-down gravel guards attach to wading boot laces with hooks Dense footbed to help minimize compression Size + Fit Guide: XS: Mens: 5-6 / Womens: 6-7 S: Mens 7-8 / Womens: 8-9 M: Mens 9-10 / Womens: 10-11 L: Mens 11-12 XL: Mens: 13-14 XXL: Mens: 14+ About The Brand Patagonia travels the globe in search of the best materials for clothing, accessories and luggage. Their mission statement is to "Build the best product, cause no unnecessary harm, use business to inspire and implement solutions to the environment" Patagonia Yulex Wading Socks With Gravel Guard - Black | SurfStitch