Ⅰ. The Catalyst 2 Hand Paddles from TYR will help you to train harder, and smarter. For swimmers of all levels, these hand paddles help improve stroke technique while building arm strength. Its unique shape improves water feel and distributes pressure evenly for reduced shoulder stress. Ⅱ. The Catalyst 2 training paddle is constructed with polypropylene, making it extremely durable, lightweight, and flexible. Featuring a design which offers more strap configuration options and greater comfort, these swim paddles will take your training to the next level. Ⅲ. Available in 5 color-coded sizes from XXS to L: XXS - FL. Orange: 5.75 inches W, 7.5 inches H XS - FL. Green: 6.5 inches W, 8.5 inches H S - FL. Yellow: 7.5 inches W, 9.5 inches H M - FL. Red: 8.25 inches W, 9.75 inches H L - FL. Blue: 8.75 inches W, 11.5 inches H Ⅳ. Features: For swimmers of all levels Improve stroke technique while building arm strength Distributes pressure evenly for reduced shoulder stress Available in 5 color-coded sizes from XXS to L