This 2-piece set is an easy way to dress the smallest athletes in comfy, coordinated style. The romper is made of cotton/poly rib knit fabric with added stretch so baby can move and play freely, with snappy tape closures on the back and inseam for smooth changing and dressing. The matching socks are made of cotton/poly fibers in a rib knit construction with added stretch for a comfy fit while keeping tiny toes toasty.