Material composition: 95% cotton, 5% synthetic fiber (urethane) Washing instructions: Machine wash About this product ♪ Made of soft cotton material, soft to the touch, excellent breathability, comfortable and gentle on the skin. Safe for babies with sensitive skin. ♪ Gentle on children's underwear, highly absorbent, and absorbs sweat well. Suitable for preparing for kindergarten and elementary school for ages 2-8. ♪ The waist elastic is stretchy and fits snugly around the waist, without worrying about losing its shape or falling down, and is easy to put on and take off. ♪ Comfortable boys' pants: Elaborate stitching, seams that don't feel uncomfortable, and won't irritate your child's skin. Boys' pants are breathable, absorbent, odorless, and made of super soft fabric, suitable for all seasons. ♪ Sizes: 1-3 years old (S/Height: 80-95cm), 3-5 years old (M/Height: 95-110cm), 6-8 years old (L/Height: 110-125cm), 8-12 years old (XL/Height: 125-140cm), 12-14 years old (2XL/Height: 140-150cm), 14-16 years old (3XL/Height: 150-160cm)