Non-slip surface to ensure stability  

2 In 1 Brick Made of HIGH-QUALITY EPP 100% ，the material EPP is non-toxic and tasteless, no matter at high or low temperature,it will not precipitate any toxic substances nor any smell.heavier & firmer than the ones from the same class for deeper massage than standard foam rollers. Smooth, anti-slip, lightweight yet can retain support 250 lbs and shape after heavy uses High density foam structure provides a deeper massage, and is firm enough to support all body types without losing shape after regular use.Multi spiky points and ergonomic design deliver a deep tissue massage straight to your tired, aching zones, bones, and muscles. Smooth roller ,yoga block,foam rollers and massage balls work with no sound even when using as a muscle massage stick or an ab mat Foam rolling and massage ball are perfect for self-massage therapy & myoffascial release, great for improving muscle mobility, flexibility and preventing soreness for all spo…