Soft Silicone??????COMFORTABLE FIT AND QUALITY: Carefully select high quality silicone material, soft and natural foot pocket ensures premium comfort, closed heel design creates secure fit and inhibits hyperflexion, easier to kick and less fatigue, make you feel free in the water, help you develop a stronger, faster flutter kick??????BUILD LEG STRENGTH AND ANKLE FLEXIBILITY: The short blade design of the training fins can promote shorter and faster kicks to improve technique and enhance leg strength, increases flexibility and range of motion for a more efficient kick.??????GREAT FOR ALL AGES AND ABILITIES: The swim fins are perfect for all levels of training, teaching, and recreation, great to use for lap swimming, longer freestyle, backstroke, and kick sets. Appropriate for fitness and competitive swimmers to build cardiovascular conditioning and speed training. 6 unisex size choice for Kids, Children, Teens, Adults(women, men).??????BLADE ANGLE: Fin blade aligns with the natural angle of the foot, promoting a shorter, faster kicks while generating propulsion through the water, increasing the speed and endurance of your swimming. Non-slip shadow design on the bottom, safe to use.??????AN IDEAL CHOICE FOR SWIMMERS AT EVERY LEVEL: short fins are designed for lap swimming training to build leg strength, added speed and endurance. Buy our swimming fins will be given a mobile phone waterproof bag, 1 convient quick-dry mesh bag. If you have any dissatisfaction, welcome to contact us. We will provide you worry-free shopping experience and satisfactory after-sell service.