ALWAYS CHECK THE SIZE CHART (IN IMAGE SECTION ABOVE). SIZES PROVIDED ARE UK SIZES, BE SURE TO MEASURE AND CHECK THE SIZE CHART BEFORE ORDERING. TYR Hexa Diamondfit swimsuit in Black and Blue is a great choice for regular pool use. Constructed with TYR’s most durable textile, Durafast Elite® - this performance training swimsuit utilizes high denier poly fiber and innovative circular knit construction to combine the strength and colorfastness of polyester with the comfort of spandex. Featuring a medium neckline, sleek/flexible straps, keyhole back, moderate cut leg, and graphic print, the Diamondfit is ideal for athletes who want reliable coverage during every swim. TYR performance swimsuits are fully lined, provide UPF 50+ sun protection, 360-degree range of motion, and an antimicrobial lining for freshness. All Durafast Elite® suits are chlorine proof and sustain an impressive 300+ hours of performance. Features: Constructed with TYR’s most durable textile, Durafast Elite® Utilizes high denier poly fiber and innovative circular knit construction for strength and colorfastness Combination of the durability of polyester with the comfort of spandex Medium neckline for a comfortable fit Sleek and flexible straps Keyhole back design for added style and functionality Moderate cut leg for ease of movement and comfort Eye-catching graphic print Ideal for athletes seeking reliable coverage during every swim Fully lined for added durability TYR Durafast Elite®: 94% Polyester / 6% Spandex