Top surface: micro (polyester) fabric, bottom surface: 100% liquid-proof 1. quality membrane coating. edge: 2.5 cm thick, stretchable up to 45 cm, elastic 4 corner rubber bands, fully passable, do not slip under the duvet cover, they are a perfect fit without interrupting your comfort. offers protection. the product is not in the form of a cover, it is in a flexible structure that surrounds your mattress. for this reason, you should choose the same size product as your bed when ordering. if you do not want to use the product for many years and have no shrinkage problems, wash it at as low a temperature as possible. although the highest recommended temperature is 40 degrees, it has been proven in the r&d tests that the product's lifespan is extended if the product is washed at 40 degrees. fluid, blood etc. it is impermeable and fully protects the mattress. · it prevents the formation of bad odor. · it does not contain any pvc-based material. · it breathes thanks to its micro pores. · it is antibacterial and anti-allergic. · it protects from microbes, pests, myte and similar pests. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.