DryTime Dispsable Youth Protective Underwear features a soft waist and hip elastic for the comfortable fit of underwear. Discreet white cover has a moisture-proof barrier and the look and feel of underwear. Medium, unisex, fits 40-70 lbs. (19-32 kg) and measures 15"- 20" (39cm-51cm.) Large/X-Large, unisex, fits 70+ lbs. (32+ kg) and measures 20"- 28" (51cm-72cm).