Straame Heated Underblanket, Double, 135 × 120 cm

Straame Heated Underblanket is a double-size electric underblanket intended to lie flat on the mattress beneath normal bedding. Its detachable controller offers four heat settings, with a stated 10-hour automatic shut-off. The listing gives conflicting size and care details, so confirm these before choosing it for a particular bed or washing routine.

At a glance

A single detachable controller provides four choices: Warm, Low, Medium and High.
The listing states overheat protection and automatic shut-off after 10 hours.
Four tie-down loops are specified to help keep the blanket flat on the mattress.
The textile is described as machine washable after removing the controller.

Price

£21.24Save 41%

Reference price: ~~£35.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Four heat settings allow adjustment through the supplied controller.
The stated automatic shut-off and overheat protection are relevant features for bed warming.
Tie-down loops are specified for positioning the underblanket beneath normal bedding.

Technical specifications

16 specifications

Identity
Brand	Straame
Model	Heated Underblanket

Size and installation
Size	Double
Dimensions in title and feature text	135 x 120 cm
Dimensions listed in details	120L x 60W centimetres
Weight listed	1500 Grams
Securing method	four tie-down loops

Heating and operation
Power	85 W
Heat settings	Warm, Low, Medium and High
Automatic shut-off	10 hours
Supply	220–240 V AC, 50 Hz
Insulation	Class II double insulation

Materials and care
Material listed	Fleece, Polyester
Textile material claim	100% polyester
Wash temperature and method in feature text	up to 40°C or hand washable
Care instructions in details	Do Not Dry Clean, Do Not Iron, Do Not Tumble Dry, Machine Washable On Gentle Cycle, Remove Controller Before Washing, Wash At 30 Degrees Celsius

What to know before buying

Listing details to confirm

The listing is inconsistent about dimensions: the title and feature text say 135 x 120 cm, while details give 120L x 60W centimetres. It also describes this as double in the title and features but calls the listing single in the longer description, which gives a separate single size of 135 × 65 cm and power of 40 W. The double specification elsewhere is 135 × 120 cm and 85 W. Care instructions conflict between 30 degrees Celsius and up to 40°C. Confirm the selected size and washing limit before purchase. The manual guidance says not to use it while sleeping, to keep the pillow area clear and to avoid folds or creases. Use only the supplied controller and ensure the blanket is completely dry before use.

What’s in the box

Included

Controller
Heated underblanket
Power cable

Who is it for?

A good fit for

Buyers seeking an underblanket with four selectable heat settings and a detachable controller.
People who want a stated double-size blanket with tie-down loops, after confirming the dimensions against their mattress.

Less suited to

Buyers who need independently confirmed dimensions or a clearly consistent washing temperature.
Anyone looking for a blanket the listing says is suitable to leave on while sleeping.

Straame Heated Underblanket, Double, 135 × 120 cm · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 13 ratings

5 stars45%45%
4 stars38%38%
3 stars0%0%
2 stars17%17%
1 star0%0%

Aggregate ratings are generally favourable but include a notable lower-star share. With a small rating sample and no written feedback supplied, these figures cannot explain what customers liked or disliked, or establish how well the blanket performs. Consider them alongside the unresolved listing details, especially the size and care instructions.

Frequently asked questions

What size is this Straame underblanket?

The title and feature text state 135 x 120 cm, but the details give 120L x 60W centimetres and the longer description also calls the listing a single model. Confirm the selected size before buying.

How many heat settings does it have?

The feature text lists Warm, Low, Medium and High, controlled with one detachable controller.

Can it be machine washed?

The listing says to remove the controller before washing, but gives conflicting limits of 30 degrees Celsius and up to 40°C. It also advises against tumble drying, ironing, bleaching, dry cleaning and wringing. Check the manual for the correct care limit.

Is it intended to be used while sleeping?

The longer description says the manual recommends not using the appliance while sleeping. It also advises keeping the pillow area clear and avoiding folds or creases.