Our comfortable, durable YulexA(R) Wading Socks are made with 85% natural rubber and 15% synthetic rubber by polymer content. Perfect for wet wading or for wearing inside our packable waders or wading pants for extra warmth. Fair Trade Certified(TM) sewn. Features Great for Wet Wading Minimalist design for wet wading Fit Details Can be worn inside packable waders for increased volume and comfort in boots 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 227 g (8 oz) Materials Exterior: 2mm 85% YulexA(R) natural rubber/15% synthetic rubber by polymer content Lining: 88% recycled polyester/12% spandex jersey The natural rubber is derived from sources that are Forest Stewardship CouncilA(R) certified by the Rainforest Alliance