Composition:83% Australian Merino15% Nylon2% Spandex - Design: - Height – 3/4 - Cushioning – High - Weight – Heavy - Features: - SFS (Secure|Fit|System) - Wilderness - Wool - EXP – Chlorine Free - Relaxed, padded cuff reduces calf pressure - Heavy weight, all conditions comfort - Reinforced heel and toe - High cushioning perfect for everday wear - Virtual seamless toe seam - Made In Australia - Small - US Women 5-9, US Men 4-8Medium - US Women 10-13, US Men 9-12Large - US Men 13-16