180 by 130 cm and 120 W, with settings of 35, 40 and 45 degrees and a detachable controller. EUR 53.15, rated 4.3 from 6,757 reviews. It cuts out after three hours, so one cycle is 0.36 kWh: a ceiling, not an estimate.

What you need to know

When October arrives, the first thing that gets cold in a living room is not the room, it is the person sitting still in it. This Klarstein XL heat blanket measures 180 by 130 cm, is rated at 120 watts, and offers three settings of 35, 40 and 45 degrees through a detachable LCD controller; take the controller off and it goes in the washing machine. The manufacturer presents the timer as a safety feature: it switches itself off after three hours. It sells for €53.15 including VAT, rated 4.3 from 6,757 reviews, shipped and sold by Klarstein Netherlands. The reason to look at it now is not the price. It is that the three-hour ceiling turns an evening's electricity into a number you can actually work out.

First, what it is not. It warms a person, not a room. Switching the heating off and relying on this all winter does not work, because after three hours it cuts out on its own. The single thing it can replace is turning the living-room thermostat up a degree for the sake of two or three hours on the sofa.

Specification: 180 by 130 cm, microplush, 2 kg, rated 120 W, three settings at 35, 40 and 45 degrees, detachable LCD controller, machine washable once the controller is removed. (source 1)
Timer: the manufacturer states it switches off automatically after three hours so the blanket never keeps drawing power. The same sentence means it cannot run overnight. (source 1)
Listing data: €53.15 including VAT, rated 4.3 from 6,757 reviews, shipped and sold by Klarstein Netherlands, returnable within 30 days. (source 1)
The official saving benchmark: Milieu Centraal states that keeping the thermostat no higher than 19 degrees while you are home saves €170 a year, working from an assumed long-term gas price of €1.37 per cubic metre for 2026 to 2040. (source 2)
Two numbers worth holding on to: €170 is a full year of not turning the thermostat up, and 0.36 kWh is what this blanket draws over one complete timer cycle. (source 2)

The sum is one step and it takes your own electricity price. 120 watts times three hours is 0.36 kWh, and that is a ceiling rather than an estimate, because the blanket has cut out by then. Multiply 0.36 by whatever your contract charges per kWh and you have the most it can cost you in an evening. To find that figure, look at the line on your energy bill for stroom per kWh. The listing cannot do this step for you, because every contract differs.

The second sum is the one that decides the purchase. Take that per-evening cost, multiply it by the number of evenings you expect to spend on the sofa this winter, and you have a seasonal cost. Now hold it against Milieu Centraal's €170. That figure is the annual difference from not pushing the thermostat past 19 degrees while you are home, so if the only reason you turn the living room up is those few evening hours, the two numbers describe the same problem solved two ways and you can subtract one from the other. If your thermostat already sits below 19 degrees, then this blanket buys comfort rather than savings, and you should not use energy as the reason.

Three practical details worth knowing first. The settings are 35, 40 and 45 degrees, and the lowest is already close to body temperature, so most people live on the bottom setting rather than the top one and draw less than the 120-watt headline. The controller detaches and the blanket machine washes, which is what decides whether it survives a second winter on a sofa. And 180 by 130 cm is generous for one person and tight for two, so if two of you will share it, look at the larger size in the same range before deciding.

The Amazon link on this page is an affiliate link. If you order through it the price is still €53.15, and Hokimi may receive a small commission.

Price: €53.15 including VAT; no struck-through list price shown
Rating: 4.3 stars across 6,757 buyer reviews
Specs: 180x130 cm - 120 W - three settings at 35/40/45C - three-hour auto shut-off - microplush - 2 kg - washable with the controller removed
Platform: Amazon.nl, ASIN B01M8PIY3F, sold by Klarstein Netherlands
Checked: Listing read on 8 September 2026