Take our most popular lightweight no-blister style, Coolmesh ll socks. Add merino woolto the outside layer only. Now you have a super lightweight design with all the values of wool - natural moisture absorption, temperature control, no smell and best yet - no woolly scratch against the skin. Terrific for hiking, trekking, backpacking, and trail running. OUR BLISTER-FREE HIKING SOCK FEATURES Mesh panel for enhanced air flow Recycled Polyesterperformance fibers improve moisture management and increased durability Stabilizer Zone™ in arch locks sock in place Styles and colors for all tastes Blister-Free socks - No Blisters, Guaranteed! ANTI-BLISTER HIKING SOCKS FIBER CONTENT Inner Layer: 70% Recycled Polyester, 26% Nylon, 4% Lycra® Outer Layer: 71% Merino Wool, 24% Nylon, 5% Lycra® ANTI-BLISTER HIKING SOCK SIZING GUIDE Finding the right fit is essential for blister prevention on long hikes! You can view our sizing chart below.  We invite you to contact us , or head to our FAQ page to find the answers to common customer questions. As an American-made, family-owned business, we thank you for choosing Wrightsock anti-blister hiking socks.