Made in USA U.S. Merino Wool: Merino wool is soft, itch-free, naturally odor- and bacteria-resistant, cool in the summer and warm in winter. We source our 100% U.S. grown merino wool exclusively from sheep raised by American farmers on American farms. Bottom-of-Foot Cushion Zone: Found throughout our Sport collection and in some Hike models, bottom-of-foot cushioning adds shock-absorbing loop knit across the entire sole, from the toes to the heel. Cushioning here reduces impact from running and hiking, and the fitted instep won??t interfere with low-volume shoes. Half-Density Cushioning: On the inside of the sock, a terry knit loop every other stitch creates half-density cushioning to add softness and wicking performance without dramatically affecting sock thickness. Its lower density makes it ideal for casual socks. Seamless Toe Closure: Advanced knitting techniques create a totally flat connection in the toe box, reducing bulk and eliminating blister-generating friction. Comfort Compression: Circumferential compression from the top of the sock through the arch creates a precise, comfortable fit that helps support the foot throughout the day.