Sturdy Construction: Featuring fiberglass rod supports at the bottom for enhanced structural integrity, this design allows for easy sliding in and out from under the bed. Additionally, reinforced cardboard sides contribute to the overall firmness Optimal Sizing: Choose from two sizes to suit your needs: Large (29.5"×23.6"×4.3", with 8 slots) and Extra Large (39.5"×23.6"×4.3", with 10 slots). Each slot is designed to accommodate larger footwear, including high-tops, heels, and men's sports shoes