The Real Swim Diaper! Swim-sters are designed to help public swimming facilities meet standards for healthy swimming. They also can take the place of traditional diapers when your child is playing in the water. Designed to not absorb or contain liquids but can contain solids without adding weight. Designed to not come apart in the water and clog filters. Constructed to fit comfortably and discreetly under a swimsuit, replacing traditional diapers in water. Machine washable. Hang to dry. Color shades may vary. May also be used as a diaper cover if desired. Sizing: XS-Size 6/8-Waist:17"-24", Weight: 40-58 lbs; S-Size 8/10-Waist:18"-27", Weight: 59-74 lbs; M-Size 10/12-Waist: 20"-29", Weight: 75-89 lbs; L-Size 14/16-Waist: 21"-32", Weight: 90-118 lbs; XL-Size 18/20-Waist: 22"-34", Weight: 119-141 lbs.