Merrell E.W.E Technology combines Merino Wool and Duraline to maximize moisture dispersal. Womenï's specific fit. Thin knit for a low-bulk fit and lightly cushioned under foot for comfort. Arch support for fitted comfort. 36% Nylon/Polyamide, 31% Merino Wool/Wool, 31% Duraline/Polyproplene, 2% Lycra/Elastane.