The Hike Medium Crew Sock from SmartWool is an all-purpose three-season outdoor sock which was designed for rugged day hikes or moderate backpacking. Arch brace holds the sock in place and adds additional support. A flat knit toe seam keeps you comfortable throughout the day. WOW technology incorporates extra Merino in the high impact and high wear areas around your toes and under your heel to help reduce shock and abrasion and give you extra comfort.