Durability knows no limits with the Women's TYR Durafast Solid Diamondfit Swimsuit. All-polyester Durafast fabric is rated by TYR at 20 times longer lasting than traditional swimwear — the fit won't sag and the color won't fade in sun or chlorine. Four-way stretch and UPF 50+ pair with the Diamondfit cut's medium neckline, sleek flexible straps, keyhole back, and moderate leg for reliable coverage that never weighs you down. Content: 53% Polyester / 47% Polyester PBT (Durafast) Rated 20x longer lasting than traditional swimwear Four-way stretch technology UPF 50+ sun protection Medium neckline with sleek, flexible straps Keyhole back; moderate leg cut COMFORT — Sleek, flexible straps and a moderate cut deliver lightweight, reliable coverage for daily wear. PERFORMANCE — Four-way stretch and the Diamondfit keyhole back keep shoulders moving freely in the water. DURABILITY — Durafast polyester resists sag and fade through heavy sun and chlorine, season after season.