's is a midweight, breathable blend of woolly warmth, rider-specific support, and cushioning sized just for . Features merino wool blend for wicking, breathability and comfort, quick-drying and odor-resistant polypropylene reinforced footbed, medium-density cushioning throughout, allover elastic support and chafe-free toe seam. 34% nylon, 26% acrylic, 26% merino wool, 10% polypropylene, 2% lycra, 2% elastane, machine wash.