Gymnic Sit'n'Gym Jr. Exercise Balls Hollister Replacement Filter XX-Large: US Men: 15-17 /

XX-Large: US Men: 15-17 / US Women: 16-18 / Euro: 48-50

Each length is also available in two different base materials: 3/16in Neoprene or CoolFlex

consult your doctor before use

Includes adjustable straps for attachment

This comes with 7 of our most popular straps for a wide range of activities

Gymnic Sit'n'Gym Jr. Exercise Balls Hollister Replacement Filter XX-Large: US Men: 15-17 /The Sit'n'Gym Jr. ball is designed for children and is widely used in primary schools. It provides the beneficial effects of a correct posture through dynamic sitting and increases the child's attention span and concentration. Its small feet prevent the ball from rolling away. Quantity: 1 Color: Clear or Yellow Manufacturer: Gymnic Indications: Provides the beneficial effects of a correct posture through dynamic sitting and increases the child's