This retractable screen door is made of aluminum alloy, which is corrosion-resistant and rust-proof. It features a unique hydrophobic design at the bottom with drain holes to prevent water accumulation. It effectively blocks mosquitoes and other insects while maintaining air circulation, keeping your home cool and bug-free all summer long. It can be folded for storage when not in use to save space, making it an ideal option for small apartments and compact living spaces.