Perfect for minimalist wet wading, our comfortable and durable YulexA(R) Wading Socks with Gravel Guard are made with 85% natural rubber and 15% synthetic rubber by polymer content. The fold-down gravel guards attach to wading boot laces with hooks. Fair Trade Certified(TM) sewn. Features Ideal for Wet Wading Fold-down gravel guards attach to wading boot laces with hooks Construction Details Dense footbed to help minimize compression Fair Trade Certified(TM) Sewn Fair Trade Certified(TM) sewn, which means the people who made it earned a premium for their labor Country of Origin Made in Thailand. Weight 318 g (11.2 oz) Materials Exterior: 3.5mm 85% YulexA(R) natural rubber/15% synthetic rubber by polymer content Lining: (upper) 100% recycled polyester jersey; (footbed) 95% nylon/5% spandex The natural rubber is derived from sources that are Forest Stewardship CouncilA(R) certified by the Rainforest Alliance