Maximum comfort and protection for the day hikes or extended backpacking in warmer weather conditions Features Thorlo legendary padding in the heel and forefoot Padding is clinically shown to reduce blisters, moisture, pain, and pressure Cushioned instep and arch for better fit, more support, and less pressure on feet Constructed with exclusive blend of Thor-Lon and Thor-Wick COOL fibers that channel moisture away from the foot Fibers are chosen for performance and durability resulting in a sock that wears for years