1-pack; boot height; Twin Knit combines a durable exterior with a moisture-wicking interior Form-fitting True Rib cuff will stay put without compression; moisture-wicking, odor resistant and temperature-regulating wool blend Heel, arch and toe cushioning; arch support Enhanced heel pocket for secure fit; ribbed channels improve ventilation on leg Abrasion-resistant yarns in heel, arch and toe; made for use in steel toe boots. Color: gray