`- DryTime DispOsable 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'' (39 cm-51 cm.) - Large/X-Large, unisex, fits 70+ lbs. (32+ kg) and measures 20''- 28'' (51 cm-72 cm).