The TYR Flexfins 2.0 Swim Fins – Natural Rubber Training Fins are engineered to build leg strength and enhance ankle flexibility during swim workouts. These fins use a full-rubber construction with color-coded sizing for pool organization. 100% natural rubber construction for durability and flexibility Designed to boost leg power and improve foot flexibility Color-coded sizes make identification easy on the deck Suitable for swimmers of all levels for technique and conditioning Compact and lightweight for convenient carry Empower your kick with the TYR Flexfins 2.0 on every training day. SIZING CHART:XXXS - KIDS (12-1)XXS - KIDS (1-3)XS - MENS (3-5) WOMENS (4.5-6.5)S - M (5-7) W (6.5-8.5)M - M (7-9) W (8.5-10.5)L - M (9-11) W (10.5-12.5)XL - M (11-13) W (12.5-14.5)XXL - M (13-15)