Smooth gym ball; 1. Material: soft PVC; meeting EU and ASTM standard; 2. Customized size,color and logo available; Gym Ball/Exercise ball/Fitness ball/Yoga ball/Pilates ball/Swiss ball/Fit ball; regular gym ball; Description: Gym ball, other names, like swiss ball, fitness ball, exercise ball, yoga ball, workout ball, stability ball, etc; Made of resistant PVC material; Range of woof on the ...