PurAthletics Air Balance Disc, 3inH x 13.4inD x 14.6inD, Blue

Get your spine in line Air Balance Disc is designed to prevent back discomfort and relieve stress on the spine. Helps with spinal alignment, improving posture. Promotes "active sitting". Use the Balance Disc while standing, kneeling or sitting. Increases intensity when stretching or doing lunges. Improves balance and strengthens the core. Includes hand pump and free downloadable instructional sheet, and DVD at zenathletics.com