Speedo Unisex Fastskin Kickfin Swim Training, Black/Siren Red, 3 4 UK

Uses 3D foot form scan technology to create Speedo’s best ever fitting fin, maximising comfort and power transfer from greater overall foot contact- so you can swim faster with less discomfort for longer Short dual rail blades capture more water during the kick, giving enhanced energy transfer from your kick to the water compared to a flat fin, resulting in greater propulsion Dual material construction makes the fin 40% lighter* for faster turns and reduced hip flexor soreness * vs nearest competitor fin Tread pattern added on sole of foot to give additional grip on turns and when diving off blocks