Gore-Tex liners. Sometimes used in fiber-glass casts, the material helps water evaporate. Insurance companies don’t always want to pay extra for it. See goremedical.com.
Buy a latex cover. Pull a bright blue XeroSox Pro Pump ($29 to $39; xerosox.com) over a cast–and then squeeze the special pump to vacuum- seal it.
Go basic. Grab a sturdy bag and fasten it with duct tape or rubber bands. But doctors still discourage kids from getting soaked. “No child’s life is going to be ruined by a short time not being in the water,” says Dr. Stuart Weinstein, a pediatric orthopedic surgeon at the University of Iowa. Try telling that to an 8-year-old.
