Pre-owned size XS ( 4-5 ) Please look at the photos for item condition and style. Develop your swim technique using these short blade fins. Made from soft silicone for comfort and a secure fit, these essential tools help strengthen and speed up your kick for overall better performance in the pool. 100% Silicone Made in the USA Soft silicone short blade training fins help you develop a stronger, faster flutter kick.Super-soft silicone foot pocket provides extended comfort and secure fit.