Main Features: ● Nano-fiber electret filtering technology, the air filter is apparently able to achieve PM2.5 filtration efficiency of up to 99 percent ● Three adjustable modes, the mask has a thin fan with 3 speeds, and you can adjust the fan speed by a button, which is designed for meeting different demands on various conditions and relieving the suffocating feelings ● Food-grade PC material, quiet and ultra-thin fan, the mask is safe and comfortable to wear ● Three-dimensional structure, compact appearance, and lightweight design ● A perfect gift for outdoor sports Warranty : 7 Days Easy Return
