"Plenty of cushioning for those long hikes, or long dreamt of outings. Just enough stretch nylon in tops to slip on easily. Alpaca/wool blend can't be beat for moisture absorption. Potential blisters don't stand a chance. Perfect for hiking in colder climates. CREW Height. Content: Toe/Heel: 45% Alpaca, 45% Merino Wool, 10% Nylon. Arch/Instep: 75% Wickspun? Acrylic, 25% Nylon. Leg: 90% Wickspun? Acrylic, 10% Nylon. Styles:"