Advanced thermal insulation delivers exceptional comfort: An upgraded double-layer honeycomb design features a dense pleated fabric as the insulating layer,absorbing and blocking most heat. The inner silver layer acts as a reflective barrier,effectively reflecting 99% of UV rays. This Lippert thin shade curtain reduces heat transfer year-round,keeping your RV interior more comfortable during summer heat and winter cold while easing the burden on your cooling system. Custom Size 12“ x 21”: Our rv entry door window shade replacement is customized compatible for prepped Lippert thin shade ready frame entry door. Widely used 12 x 21 inch pleated window shades with lippert shades ready frame entry door. Easily Adjust: Simply push or pull to easily adjust light and levels. Easily adjustable to allow you to enjoy the outdoors while still maintaining ,the RV door screen defender is a must-have addition to your RV accessory collection. Quick DIY Installation in Minutes: Designed as a direct replacement,installation is simple. Remove the window frame,snap the shade into the prepared channel,and reattach the frame. No special tools are needed—it’s a fast,frustration-upgrade for your camper. The sunshade comes with a detailed installation manual. Energy-Efficient & Quietly Refined: Beyond its sleek appearance,this shade blocks sunlight to help maintain interior temperature,promoting energy efficiency. Securely fixed inside the window,it also reduces noise and rattling for a quieter,more stable ride compared to traditional blinds..