Window insulation kit, 27 x 39 inches

A standard curtain can soften a room, but it may not do much to address cold air around a window. This insulated cover is designed for that more specific winter problem.

Its layered construction adds padded coverage over the opening, and the hook-and-loop strips are intended to keep it in place without a permanent fixture.

The main tradeoff is size: the cover measures 27 x 39 inches and is listed for windows up to 24 x 36 inches. A larger window needs a different solution.

Technical details

The outer layer is windproof Oxford fabric, with 180g cotton padding inside. Ultrasonic stitching is used to hold the filling in place. The maker also describes the outer fabric as waterproof and says the cover can help block rain, but the product details don’t specify a tested insulation rating or measured energy savings.

The cover measures 27 inches wide by 39 inches long. Its recommended maximum window size is 24 inches wide by 36 inches long, leaving room for the cover to extend beyond the opening. That makes measuring the window itself more useful than relying on the listed cover dimensions alone. It comes in black and includes adhesive hook-and-loop strips that are 1.5 inches wide, plus two buckles for rolling it up.

What it works with

This is intended for windows in a home or RV, including bedroom, living room, kitchen, basement, and skylight settings. It can be used on its own or layered over regular curtains or blinds, so it may suit someone who wants extra seasonal coverage without replacing existing window treatments.

The adhesive fastening strips are described as sticking to almost any surface, but the information doesn’t identify specific surface types. If the window frame has an uneven or delicate finish, the adhesive approach may be less straightforward than a curtain that hangs from existing hardware.

Usage tips

Measure the glass opening and compare it with the recommended maximum before installing. For a bedroom window measuring within 24 x 36 inches, the extra material can cover beyond the opening, press the fastening strips around the window area to secure the cover. When you want to let in light or open the window, the included buckles are meant to hold the cover rolled up, so you don’t have to remove it each time.

The product is presented as useful in both winter and summer, with the winter use focused on limiting drafts and the summer use on blocking heat. Results will depend on the window and how well the cover attaches, and no quantified temperature change is provided. It makes sense if you want a removable padded layer for a smaller window. It might not be a great match if your opening exceeds the stated fit or you need a measured performance guarantee.

Before you decide

Will it fit a 24 x 36-inch window? The listed recommendation is for windows up to that size, the cover itself is 27 x 39 inches.

Can you open the window without taking the cover down? The two buckles are included to roll and hold it up, allowing access without removing the cover.

Can it go over existing curtains or blinds? Yes. The product description says it can be used alone or alongside regular curtains or blinds.

Should you buy it?

According to the maker, the padded Oxford cover is meant to help block cold drafts, and the same cover can also be used to block heat in warmer weather. Choose it if the listed dimensions suit your window and you want a seasonal layer that can roll up when you need access. If you need coverage for a wider opening, or prefer a solution that doesn’t rely on adhesive strips, this particular kit’s size and fastening method are meaningful drawbacks.