The heaviest sock available from Simms. A must for cold-weather fishing. FEATURES: 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 Small fits Wmn's 4-6 Medium fits Wmn's 6.5-10, Men's 5-8.5 Large fits Wmn's 10.5-12.5, Men's 9-12.5 XL fits Men's 13-15 Made in USA Vendor: Simms