Fitness Hover ABS Balance board for kids yoga excercise stability training

Static pressure testing -- No mutations occurs after time 1 hour under 700kgs pressure (approx 1500Lbs). When shopping around for an exercise ball, note that what many of other companies balls are slim & light weight, indicative of inferior quality.

Dynamic durability testing - No mutations occurs after 20,000 loading cycles of an elastic load of 130kgs (approx. 260LB), this is a destructive testing. We state 260LB instead of 1500Lbs in the package box, to avoid extreme destructive testing or using by few customers.

Anti-burst testing -- The ball is loaded, then, on the maximal lateral extent a pointy object (e.g. a pin or tack) with diameter 1.5mm is driven into the ball with a force of 750N and then removed. Afterwards, the ball is loaded 20times with 750N. Interval:15 cycles per minute. No sudden explosive breakage occur, i.e. air exit the ball slowly.

BPA & Phthalate-Free, Eco-friendly PVC material. A top quality anti-burst exercise ball (or called yoga ball, fitness ball, balance ball,gym ball) is perfect for all exercises, athletic training, physical therapy, and Yoga routines. 60-Day Money Back & 1 Year Warranty, if you are not happy within 60 days we will refund or replace the product.