1. Winter Insulated Window: this window insulation kit is made of thickened PE material, which is 75% thicker than ordinary window insulation, more durable, better insulation effect, tear resistance, wind resistance, good toughness and shrinkage, it has good elasticity, strong tensile force, no deformation, and is waterproof; It can keep indoors warm in winter and cool in summer, and there are few wrinkles during installation, and no heat shrink treatment is required 2. Large Size: the package contains 3 piece of 63 x 63 inches/ 160 x 160 cm cuttable transparent film and 6 rolls of 0.78 inch wide hook and loop tape, suitable for most window sizes, enough for a family to get through the winter; The adhesive tapes are wider and stickier, allowing for firm use and durability 3. Reusable: for daily use, just wipe with a damp cloth to remove dust; To clean, simply remove the attic door insulation cover from the window and rinse clean before installing it back on the window to dry; The material is soft, tough, transparent, and can be folded for easy reuse in the future 4. Easy to Install and Remove: hook and loop, windproof hook and loop fasteners are added to the top and sides of the window insulation for winter for reinforcement, it can adhere well to the frame, easy to install with adhesive loop tape, no drilling tools required, just peel the window can be opened for ventilation by lowering the strap