Upgraded Thick Sponge Material: Adopts high-density thick sponge core, outstanding shock absorption & anti-collision buffer performance. When your racket accidentally hits table edge, floor or hard objects, the sponge layer absorbs impact force greatly to avoid wood crack, edge chipping and paint scratch of expensive blade. Strong Self-adhesive Back Glue: Comes with pre-coated high-viscosity adhesive on the back, no extra glue needed. Peel off the backing paper and stick on racket edge directly, convenient for DIY installation within minutes. Long-lasting Strong Adhesion: Premium adhesive won’t fall off easily after long-term use, resistant to daily sweat, slight temperature change and regular friction, stable stickiness lasts for long-time training use. Flexible Fit Design: Soft sponge fits radian of racket edge closely without bulging or warping, won’t affect rubber sticking and normal hitting feel of your table tennis racket.