LIGHTER...COOLER...EASIER TO WEAR A lightweight form of polyurethane foam sewn permanently into your favorite bra style! Form has small metal cores, which help restore body balance, yet leave the form lighter than silicone. Foam is Lighter ... Less than the weight of silicone Foam is Cooler... More comfortable on those hot, humid days Bra is easier to wear if you have arthritis or if you have trouble fitting the form into the pocket... Hand wash and line dry.