With full, plush cushioning, the Classic Mountaineer Maximum Cushion Crew sock is just right for your long-distance and backpacking hikes. Its elasticized arch brace offers secure, lasting fit, and its flat knit toe seam helps with in-shoe comfort. Smartwool's thickest, warmest sock, this wool crew helps ensure that your feet stay comfortable, no matter how long the hike. Fit & Design: Elasticized arch brace for secure fit Flat knit toe seam for additional comfort Made in the USA Maximum cushion: great for consumers who are hiking long distances and carrying heavy packs