Cressi Light, Swim Fins for Men, Women and Kids, Short Training Fins for Swimming Italian Quality Since 1946 The Cressi Fins come labeled with EU and UK sizes only. The Light fins are specifically designed for pool use and for swim training, but can also be used adequately for recreational swimming and snorkeling. The short blade is made of a highly reactive and light material which guarantees agile and effective kicking while not tiring out your legs. The length of the blade has been researched and studied by Cressi to ensure perfect muscle training without causing cramps or discomfort. Foot pocket is made from soft rubber elastomers - great deal of comfort, even during long swimming sessions.