The product is made of high performance plastic. It does not contain carcinogenic substances. Practical Solution for Shoes. No more hassle of cramped shoes stacked on top of each other. Make room for 2 shoes instead of 1. With the over-under design, one shoe goes inside the ramp and the other goes on top of it. The capacity is doubled and your space in the shoe rack becomes more comfortable. It has a long-lasting and stylish design. DIMENSIONS - Length: 25 cm- Width: 10 cm- Height: 14 cm