-keeps ball from rolling. -wheels for easy moving. -comfort foam padding backrest.

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-relieves back pain -relaxes muscles -improves circulation -tone sagging muscles -keeps you young -for height 147cm~198cm -weight capacity: 250lbs -hight quality model -patented

-relieves back pain -relaxes muscles -improves circulation -tones sagging muscles -keeps you young -for height 147cm~198cm -weight capity: 220lbs

-relieves back pain -relaxes muscles -improves circulation -tone sagging muscles -keeps you young -for height 147cm~198cm -weight capacity: 250lbs -hight quality model -patented

-relieves back pain -relaxes muscles -improves circulation -tones sagging muscles -keeps you young -for height 147cm~198cm -weight capity: 220lbs

-relieves back pain -relaxes muscles -improves circulation -tones sagging muscles -keeps you young -for height 147cm~198cm -weight capity: 220lbs

-keeps your posture right. -height adjustable -backrest angle adjustable. -N.W.:8.5 kgs