Fitting: Slightly larger than true to size. This is a 2 pc set: Pullover Sweater and Jogger pants. French Terry knit with Rib cuff Material: 95 cotton 5% spandex Baby Toddler and Kids Every day Clothes made with clean cotton and a touch of spandex for comfort flexibility and durability! We recommend washing this set in cold water with like colors and hanging or laying flat to dry. Machine dry on low heat is also safe and will not shrink this set. We also recommend Using natural detergents and avoiding softeners and bleach on our baby clothes, knits, linens and especially organic cottons.