Circumference: 26.8 - 28.0 in./68.07 - 71.12 cm
Weight: 13.9 - 15.9 oz./394.06 - 450.76 g
Cover: Polyurethane/Cotton/Polyester
Bladder: Butyl
New competition DYNAMO has a 32 panel metallic design for greater visibility. This model is hand stitched for extra durability and features a four ply cotton backed PU composite cover. Official Size 5.