UltraSpire Soft Flask 500ml Size:500ml Propulsion Meets Efficiency with a

Propulsion Meets Efficiency with a Full-Length Carbon Fiber Plate

making it an excellent choice for kids who are developing their speed

Heel Drop: 8mm for balanced support

Velcro Fastening: Offers a secure fit

Sweat-wicking fabric helps you stay cool and dry and Featherlight vents improve airflow where you need it most

UltraSpire Soft Flask 500ml Size:500ml Propulsion Meets Efficiency with aUltraspire Soft Flask 500ml The ideal hand held solution for running or hiking Oval welded base for easy pocket placement while on the move Soft material conforms to your hand to provide a comfortable carrying experience Flexible design shrinks as you drink, reducing water movement on the run High flow bite valve auto seals after each sip and includes a twist locking cap for added security Large 42mm opening makes it easy to fill with ice or nutrition