1. Easy washing in the washing machine: No hand washing required! Just remove the sand and put it in the washing machine. You'll be free from the hassle of washing shoes! 2. Perfect for indoor shoes: Can store one pair (or two smaller pairs). Dries by Monday morning, making school preparations easy! 3. Material friendly to shoes: Microfiber gets into the uneven surfaces of the shoes and gently removes dirt. Prevents deformation and damage! 4. Excellent ventilation for quick drying: The good breathability allows them to dry quickly after washing. Perfect for busy people! 5. Protects the washing machine: Comes with a zipper cover, so you can wash your shoes with peace of mind without damaging the washing machine or shoes. Thank you for viewing.