FLASH SALE: Fitness, Stability and Exercise Ball by Elephant Strong Anti-Burst: Made with thick, durable and environmentally-friendly materials (PVC). We stand behind our word, so if your ball bursts we send you a new one! Slip resistant: the ball is designed with the lines specifically to give you traction during your toughest workouts Includes a foot pump to easily inflate the ball Perfect for strengthening your abs, core and lower back muscles Whether you're doing yoga, Pilates, general strengthening or working on your balance the Elephant Strong ball won't let you down!