Please try it once‼︎ Your glasses really won't slip off‼︎ The hooks firmly hold your glasses, preventing them from slipping even during strenuous exercise‼︎ ● This is a set of two pairs (4 pieces) of white glasses stoppers that prevent slippage. ● Made of soft silicone, they fit snugly, allowing you to spend time stress-free even during exercise such as running! 【Size】 Please refer to the image. 【Material】 Silicone