Boulder NO FLY ZONE Lightweight Crew

 All No Fly Zone socks are manufactured using yarns treated with  permethrin insect repellent. Odorless and durable, permethrin repels  common biting insects like mosquitoes, flies, chiggers, midges, ticks,  and ants. And best of all, it doesn’t alter the amazing qualities of our  100% US-made merino wool. Wearing the No Fly Zone Boulder lowers your  chances of getting bothersome bites - or worse, insect-borne diseases -  on your next day hike or backpacking trip.      

• 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. 
• Outer Nylon Plaiting
  A more traditional sock construction technique that  produces classic linear patterns and heather textures, outer nylon  plaiting knits the stretch yarns in the outer layers of the sock and the  body yarn on the inside. Reinforcing yarns woven into the stretch shell  increase durability, while wool fibers sit closer to the skin for  maximum insulation. 
• 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. 
• Full-Density Cushioning
  Full-density cushioning features a terry knit loop on  every interior stitch, providing better insulation, exceptional  wicking, and increased protection against impact. Its faster moisture  absorption keeps the skin dry and reduces friction, while its  shock-absorbing nature enhances the performance of multi-sport and  outdoor 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. 
• Durability Assured
  Reinforced construction and low-stress seam placement reduce wear and tear, increasing the life of the sock. 
• Ingredients
                72% US Merino Wool
  26% US Nylon
  2% US LYCRA® Spandex