Bridgedale s warmest women s sock features a WoolFusion blend of Merino/CoolMax in heavyweight density. Perfect for extended backpacking, trekking, and hiking. Maximum warmth in extreme cold environments or mountain efforts. Anatomic fit with tapered toe box, and relaxed fitting cuff. Best fit for high volume footwear. Guaranteed No Slip Fit. 46% polyester, 30% wool, 23% nylon, 1% elastane. Machine wash cold.