SPANX Mid-Waisted Swim Bottom with UPF Protection Smooths and firms your tummy. Front is lined with soft, smooth knit shaping fabric Back is lined with fine swim mesh. Sunscreen and chlorine resistant. UPF 50+, Seamless seat, Mid-rise. Moderate rear coverage. Leg openings have bonded edges at front. Fabric-covered elastic bands around waist and along back of leg openings. Shaping material extends down to crotch.