Sleepout Portable Blackout Curtain 3.0 XL review

The Portable XL solves a problem regular curtains cannot: it goes straight onto the window glass, so there is no gap at the sides of a rod for light to sneak through. Sleepout uses locking BPA-free suction cups, which it says hold over 100 lbs, and Velcro on every edge, so the curtain can be mounted either way round and overlapped with a second one for wide windows. The standard size is 62 x 40 inches and the large one is 86 x 54 inches; as long as the glass is smaller than the curtain, nothing needs cutting. It shares the Loop curtains' 100% blackout claim and GREENGUARD Gold and OEKO-TEX Standard 100 certification, and it comes with a carry bag, which makes it handy for keeping a toddler's nap routine on trips. The downsides are looks and price: it is a functional panel rather than decor, and one curtain is $129 on sale. Sleepout's own review summary notes that the XL may need extra suction cups to stop sagging.

Who it is for

Parents darkening a nursery, renters and families who want the same dark room in hotels and grandparents' homes.

Price

$129 Black Friday price for one curtain on the Sleepout US store ($150 regular; $99 each for 2, $89 each for 4).

1 Curtain $150 /each $129 /each
Quoted from the vendor pricing page on November 9, 2026.

Key features

• Two sizes: 62 x 40 inches for most windows and 86 x 54 inches for large windows
• Velcro on every edge for vertical or horizontal mounting
• Locking suction cups that Sleepout says hold over 100 lbs
• Sold as 100% blackout, GREENGUARD Gold and OEKO-TEX Standard 100
• Carry bag and 2 suction mounts included, 365-day warranty

Strengths and weaknesses

• Strength: Damage-free install that Sleepout times at 15 seconds
• Strength: Covers the glass directly, which limits edge leaks
• Strength: Packs into a bag for travel
• Weakness: Covers glass only, so it does not look like a curtain
• Weakness: Sleepout notes that the XL can need extra suction cups to prevent sagging, according to its review summary
• Weakness: Pricey for one window at $129

Key facts

• Price: $129 for 1 ($150 regular)
• Sizes: 62 x 40 in, 86 x 54 in
• Mounting: Suction cups and Velcro
• Certifications: GREENGUARD Gold, OEKO-TEX Standard 100
• Warranty: 365 days

Where it ranks

Sleepout Portable Blackout Curtain 3.0 XL is No. 3 in our Best Blackout Curtains verdict.