The Tasman is the perfect medium weight trekking/hiking sock. Designed specifically for extreme outdoor conditions, this multi-thickness Australian Merino Wool sock will keep you comfortable and warm in any condition. 40% Australian Merino, 40% Acrylic, 15% Polyester, 5% Elastane All-round performance Midweight Compression zones for a great fit X-tech cross-foot compression Non Slip Comfort band Seamless toe Custom cushioning Certified Carbon Neutral Product