Outer material: Cotton Inner. Material: Cotton + polyester + tpu. Sleep Training Pants with cotton have great breathability, will give baby a very comfortable feeling , it can be worn in all seasons like ordinary pants.Covered elastic waistband for comfort adjustable fit. It is easy to pull up down too. This Training Underwear is washable, suitable for dryer allow to use many time than traditional diaper. Hold up well stay vibrant after washes.Soft material Training Underwear, breathable comfortable, suitable for all seasons. quality craftsmanship fabric are good.These Potty Training Pants will not dry completely but let your baby feel moisture then they will know when should go to toilet do potty training. Training underwear are usually not completely waterproof to keep good breathability, reducing suffocation skin damage. If amount urine is large, water/urine leakage may occur.Training Underwear have an extra layer material in crotch area to absorb urine poop. Plastic underwear for toddlers are thick enough to hold a small accident without dripping. 360¡ã surround to side leakage. elastic side fits curve baby legs perfectly, making baby move freely. Strengthen absorption effect, obviously reversed flow pee, keep buttock dry.