OS1st Thin Air Performance Socks in Steel Blue Size:S Featuring a contoured footbed that

Featuring a contoured footbed that gives you the support of classic Birkenstocks

● GORE-TEX® waterproof construction ensures dry and comfortable feet in wet

Delivered as a single component using ECCO FLUIDFORM™ seamless construction

360-degrees of reflectivity

whether in whitewater or navigating a rocky trail

OS1st Thin Air Performance Socks in Steel Blue Size:S Featuring a contoured footbed thatMade for those who prefer a thinner sock that protects from blisters and keeps feet dry. Our Skin Thin top panel helps regulate temperature and circulate air throughout the sock. For the best fit, it is important to use the size chart before ordering. Ultra thin top panel to promote temperature regulation Woven lift bars to circulate air throughout the sock Targeted Conditions: Blisters Sore achy feet Hyper sensitivity Overheating Skin Thin Design