SPEEDO Medium Sonic Backpack - 25L Unisex Backpack The device improves stroke technique

The device improves stroke technique by monitoring freestyle and backstroke rhythm and timing

flexible one-piece frame for added comfort

Durafast Elite: 94% Polyester / 6% Spandex

Extended forearm section prevents wrist flexion

The gasket rests within the eye orbital with a less constricting feel

SPEEDO Medium Sonic Backpack - 25L Unisex Backpack The device improves stroke techniqueSPEEDO Medium Sonic Backpack 25LEfficient organization. Made with 100% poly fabrics. Every swimmer, from swim team to masters, knows that their go to pack for towels, toys and togs is the Speedo? team pack. Highly durable and with a feature set that is built with an athlete's needs in mind, these packs are tireless workhorses that set the bar high and become trusted friends. With the explosive growth of swim, and our increasing obsession with all