Globalstore Professional Swim Training Paddles Hand Paddles Power Paddles Swimming Training Aid Large Flat Paddles for Men Women Children Comfortable and AdaptiveThe swim paddles have comfortable adjustable straps can fix middle finger and wrist well, providing greater stability for palms when swimming Size SuggestionL:(22CM*15CM) for Adults and Bigger hand; S:(19CM*13CM) for Children and Smaller hand younger. (Training and improving swimming techniques for beginner and athlete) Dual Density and ControllableDual density construction for better grip and comfort. Tubular hand strap for micro adjustment Powerful and ChallengingUltimate training paddle for the swimmer. Ergonomic design to reduce shoulder strain, improve your swimming power and skill Ideal Gift for SwimmingCurved design for palm follow theory of nature mechanics, they are your best choice for practicability and comfort