Our heaviest, most cushion and warmest insulating model offered, the Exstream Sock from Simms features include:

• 84% Merino wool, 14% Nylon, 1% Lycra Spandex
• 16" overall leg length - from heel to top of sock
• Stretch arch panel for improved support and fit
• Reinforced toe and heel
• Excellent for cold-weather fishing

Proudly made in America and must cold weather fly fishing, we offer the Exstream Sock from Simms in range of accomodating sizes.