When the mercury rises and the humidity soars Darn Tough's Vertex Running Series socks made with Coolmax are designed to keep their cool - and you cool too. Coolmax Polyester yarns are engineered to move moisture away from your skin and be fast drying. Combine that with a sock that weighs in at a mere 13 grams and you have the ultimate warm weather running companion. True Seamless construction reduces hotspots and blisters. Ultra high stitch count creates a super comfortable sock with a streamlined fit like no other. No slipping, no bunching, no blisters. Plus they even have that handy lil' tab on the back so they slip on easy. Still made in Vermont. Guaranteed for life.

• 42% Coolmax® Polyester, 52% Nylon, 6% Lycra® Spandex
• Made in Vermont, USA
• Unconditional Lifetime Guarantee
• Performance fit and Unsurpassed durability
• Men's Sizes: Small 5.5-7.5, Medium 8-9.5, Large 10-12, X-Large 12.5+

42% Coolmax® Polyester, 52% Nylon, 6% Lycra® SpandexDarn Tough