- FEATURES :THICK SOLED : 4.0 cm thick sole design.Height-increasing, soft and comfortable.NON-SLIP : The anti-slip particles design protects your from slipping and no squek while walkingSOFT AND QUICK DRYING : All acupoints are massaged! During the design and development of sole massage slippers the designer ensured that each massage point on the slippers can correctly press the right corresponding acupoints, great for the feet of all sizes.