35 3mm upper body materials and 5mm lower body materials 85 of triathletes come to the sport from a non swimming background and many suffer from low sinking legs in the water as they swim of course the buoyancy of any wetsuit helps bring the legs up higher but never before have wetsuits been designed specifically for these swimmers with a large buoyancy difference between the upper and lower bodies until you swim in one of these suits you wonrsquot believe how high your legs can be they w