I've been wearing these for about six months. Here are the product features: 【Power Spring】 MoonStar's uniquely developed special rubber is installed in the sole, storing power when stepping on the ground and converting it into propulsion when kicking off. 【Ag+ Antibacterial and Odor-Control】 The antibacterial action of silver ions suppresses the growth of odor-causing bacteria and provides an odor-control effect. 【Washable Insole】 The insole can be removed and washed, keeping it clean at all times. 【Abrasion-Resistant Rubber】 The outsole uses rubber that is resistant to wear and tear, providing high durability. The design has a cool finish with metallic expression all over. Recommended for running scenes such as sports days, physical education classes, and club activities.