Best thermal curtains for winter (2026)

A lined, grommet-top panel pair in a standard size. The listing calls it thermal insulated and light blocking; NICETOWN's claims for light blocking differ across its own listings. A heavy lined curtain adds a layer over the glass but is not a seal.

Best for Bedrooms and living rooms that want darkness plus a heavier, lined curtain

• Standard 52 x 84 in size, pair included
• Heavier lined construction for a cold window (listing)

• Light-blocking claims vary across NICETOWN listings
• Heavy fabric needs a sturdy rod

Who shouldn't buy it: Don't buy it if you need a precise blackout percentage you can verify.

Sun Zero's theater-grade pair with grommets. The listing says it is lab-tested to block 100% of light and reduce energy loss through windows by up to 50%, which is the maker's claim. The thick layers make it heavy, so check your rod.

Best for The darkest, heaviest option for a bedroom, with a stated light figure

• Full-blackout claim by Sun Zero (listing)
• Thick construction for a cold window

• Energy and noise figures are Sun Zero's, not independent
• Heavy, may need a stronger rod

Who shouldn't buy it: Don't buy it if you want light fabric that hangs easily on a thin rod.

Eclipse's room-darkening panels, not full blackout: the weave itself blocks light rather than a separate liner. Eclipse says they help in winter and summer, which is a maker claim only. Listings put light blocking in the mid-90s percent, so some light remains.

Best for A modest, no-lining-needed curtain for living areas

• Single-layer, easy care (listing)
• Pair in a standard size

• Room darkening, not full blackout
• Energy benefit is Eclipse's claim

Who shouldn't buy it: Don't buy it if you need a full blackout for sleeping in the daytime.

A budget panel pair in polyester. The listing gives light blocking by color shade (up to 95% for dark, less for light colors), so a pale grey will let some light through. Deconovo's listings disagree on washing, so check the care label.

Best for Budget thermal curtains in a standard size

• Inexpensive pair
• Light-blocking range stated by color (listing)

• Cloud grey blocks less light than dark colors (listing)
• Care instructions conflict between Deconovo listings

Who shouldn't buy it: Don't buy it if you want a true blackout in a light color.

A pale panel pair with a dark backing so the front stays white. BGment's listings claim blackout and less heat and cold transfer, which is the maker's say-so. Check the header style, since BGment sells grommet and rod-pocket versions.

Best for White or pale curtains that still need a lining for blackout

• Pale color with a backing
• Machine washable (listing)

• Insulation claims are BGment's own
• Header style varies, check before ordering

Who shouldn't buy it: Don't buy it if you need a header style that is not clear from the listing.

A rod-pocket pair with a white liner, sold as 100% blackout in the listing. Rod pockets slide straight onto a rod, which suits a simple setup, but they do not glide as easily as grommets. The maker's lines differ in blackout percentage, so read this one.

Best for A rod-pocket style that slides onto a plain rod

• Rod pocket needs no rings
• Liner for light blocking (listing)

• Rod pocket is harder to open and close than grommets
• H.VERSAILTEX lines vary in blackout percentage

Who shouldn't buy it: Don't buy it if you want curtains that slide easily on a rod.