The MOVIT 33 cm inflatable balance and sitting cushion in black is suitable for physiotherapy, relaxation and muscle strengthening exercises. It helps to relieve strain when sitting during exercise and thus prevents back tension. For example, people who work at a computer often have poor posture that strains the back and in the long run can lead to posture problems and chronic pain. This sitting cushion helps to prevent back problems. It also functions as a training tool for balance and strengthening exercises. Tip: The rounded edges can also be used for foot massage. This is a high-quality product that is phthalate-free and made of premium materials. It is non-slip and abrasion-resistant and gentle on the skin. A pump for the sitting ball is included. Technical specifications: - Available colors: black, gray, orange, pink, red, purple, green, turquoise - Dimensions: 33 cm x 7 cm - Weight: 0.95 kg - Load capacity: approximately 500 kg - 2 sides: 1 smooth side and 1 riveted side (913 rivets).