Apexup Anti-Burst Yoga Exercise Ball for $13 + free shipping w/ Prime
Code OJ1B2KCN Validity unknown
Anyone doing core work, physical therapy, or looking for a desk-chair alternative can get some use out of this, since the anti-burst construction holds up under regular weight-bearing use. At $13.29, that's $5.70 (30%) off the $18.99 list price. Apply coupon code "OJ1B2KCN" for a savings of $5.70. Buy Now at Amazon Features Anti-burst PVC supports 660 lbs Anti-slip surface ensures stability Five size options for custom fit Versatile for core strength and active sitting Includes pump and two air plugs
No restrictions stated. That does not mean there are none.