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The toddlers' REI Monkey socks are made with CoolMax(R) polyester for long-lasting stretch and moisture-wicking comfort on little feet. Blend of acrylic, rayon and nylon adds durability; a touch of spandex offers stretch and shape retention. Medium cushioning in the heels and toes adds shock absorption and protection from wear; gripper dots add traction. *Discount will be applied when you check out. Offer not valid for sale-price items ending in $._3 or $._9.