YEAR-ROUND INSULATION- LEMOONE attic stairway insulation cover helps keep your home cool in summer and warm in winter by blocking air from moving between the attic and your rooms, making your home more energy-efficient all year. EASY TO INSTALL- Simply unfold the attic door insulation cover, position it over your attic opening, and secure itinstallation is quick and easy! Designed for attic ladder openings up to 25" x 54", it provides a secure and snug fit.