SIZE CHART:XL: suitable for height 160-170cm, for weight 45-60kg, waist 34cm;2XL:suitable for height 170-180cm, for weight 120-145kg, waist 36cm;3XL:suitable for height 175-185cm, for weight 145-175kg, waist 38cm;4XL:suitable for height 175-185cm, for weight 175-200kg, waist 40cm;Swim Jammers for Men Chlorine resistant, more compression and stronger than traditional fabrics, lightweight but not translucent, allows absolute freedom of movement.85% Polyester& 15% Spandex, Lining: 100% Polyester.Contrast side panels present a sleek look, front lined in crotch area provides extra coverage. Reinforced seams, fast drying fabric for a perfect shape and fit.Elastic drawstring waist for enhanced fit and security. If you are a competitive or experienced lap swimmer, you are going to be diving into the water, pushing off at full-force. Drawstrings are a necessity to keep your suit snug around your waist.UV protection. This means the swimsuit jammers will stand up to the sun and not fade prematurely. Particularly helpful for swimmers who have the luxury of training outdoors.These men's athletic swim jammers are great for swimming, fitness training, racing, surfing and other beach activities, professional swim jammer design allows you to show your skills in the water.