Hardness (Shore scale) 35 C.
Description: The AQUA SPEED WAVE swim board is designed to help you with your swimming training. Thanks to the buoyancy of the WAVE board, training with it will firm your lower body and improve your balance and body alignment in the water. AQUA SPEED Unisex's Swimming Boards WAVE Kickboard 38.By immobilizing your arms while holding the board, you will improve leg strength, ankle flexibility and practice leg movements while swimming.