General description The air cushion seat with spikes is designed for coordination training and dynamic sitting. It challenges your balance, requiring constant small compensatory movements to restore stability. This not only enhances coordination but also provides a full-body workout. The cushion promotes active back training, strengthens core muscles, and encourages gentle movement of the intervertebral discs. Its spiked surface stimulates blood circulation, making it an effective tool for both exercise and comfort. Technical specifications Diameter: approximately 33 cm Installation Use the included hand pump to inflate the cushion to your desired firmness. Insert the pump into the valve located at the bottom of the cushion and pump air until the optimal firmness is achieved. If the cushion feels too soft, additional air can be added; if too hard, release some air. For storage, it is recommended to deflate the cushion to prolong its lifespan. Usage Ideal for use at work, during