Fit & Design: A performance fit means no slipping, no bunching, no blisters for peak hiking comfort Ultra smooth, undetectable feel Reinforced footbed and Achilles cushion improves comfort Merino Wool is at home on the trail, naturally moving moisture to keep feet fresh and dry in all weather Lightweight socks breathe naturally and deliver flexible, all-day comfort for summer hiking The "still" in Still Made in Vermont, USA is personal. We knit all our socks at our VT-based Mills - we can't imagine it any other way Additional Details: Unconditionally Guaranteed for Life - if these aren't the longest lasting socks you've ever owned, return them for another pair