Spacesaving shoe groove that increases your storage capacity by up to 48% Key benefits Saves space: doubles usable surface of each shelf by stacking shoes vertically, making shoe racks neater and reducing clutter. Strong and durable: made from quality, environmentally friendly ABS plastic for greater load capacity and longer service life. Secure grip: textured (bump) surface and nonslip design hold soles in place so shoes won't slide off. Protects shoes: openlevel design improves air circulation and helps reduce moisture buildup compared with closed boxes. Easy to use and organize: simple placement on racks or shelves; organizes and protects shoes while making them easier to find. Important attributes Material: quality, nonslip ABS plastic; environmentally friendly and wearresistant. Function: shoe groove/stacking insert that converts single shoe rows into vertical pairs to save space. Performance: increases usable storage by up to 48%, provides enhanced load carrying capacity and longterm durability. Design: textured bump surface for sole grip and openlevel configuration to aid ventilation. Practical use scenarios Closet shelving: stack a pair of shoes on one shelf space to room for additional pairs or accessories. Entryway or hall rack: keep daily shoes organized and prevent slipping or falling when pulled from the rack. Dorm room or small apartments: maximize limited storage space while protecting shoes from moisture and scuffing. Simple, functional, and built from durable materials to keep shoes organized, accessible, and protected.