Thermal underwear instead of heating: thin layers to beat the cold at home

Thin thermal clothing for living without heating: the layer that changes everything

Twelve degrees in the living room. Thirteen in the bedroom. Five in the worst case. Some people have gone two winters without switching on the heating, while others, with a broken boiler and no money to repair it, live with a permanent sore throat. The question hovering over any conversation about household cold is no longer how much the bill goes up, but what clothes to wear so you don't have to depend on it. And the answer that comes up most often is not a magic garment: it's the layering system.

The first layer, the one worn against the skin, determines everything else. It must wick away moisture and keep the body dry; if it holds on to sweat, the cold sets in. Over it, a thin jumper or a thick shirt. On top, a fleece. Three thin layers keep you warmer than one thick one, because the air trapped between them is the best insulator there is. Physics leaves no room for argument: still air is what conducts heat least.

Decathlon, Lidl and the limits of the low price

Budget chains dominate the recommendations. Decathlon's thermal base layers (Quechua, Wedze, Kipsta) come up again and again as the entry-level option: average quality, low price. For knocking around the house in a cold part of Spain, they're more than enough. The caveat comes when the thermometer drops below zero or when the wearer feels the cold easily: that's where cheap brands fall short and it's worth spending a bit more. Lidl's ski clothing offers, even cheaper, are another common entry point.

Some go further. Military surplus technical clothing —Swedish wool shirts, surplus garments— creeps into the conversation for its heat-to-price ratio. A pack of two new Swedish thermal shirts can cost as little as one euro in surplus stores, even if the aesthetics won't set any trends. For those seeking extreme warmth without glamour, even the PVC bacteriological protection suit is put forward as an emergency solution: it gives off infernal heat, with the risk of sweating like a pig above fifteen degrees.

The calculation nobody makes: what it costs not to switch on

The economic variable is what drives the thread. A sofa electric blanket at a third of its power uses about 50 watts and keeps you warm without sending the bill soaring. Against that, an oil heating system that never goes above 18-19 degrees leaves rooms at 14 and mornings at 12.5. The difference between heating the whole house and heating the body is the key many discover too late.

The discussion soon drifts into ideological territory. Some defend living at 16-18 degrees as an exercise in endurance and a critique of the energy system; others point out that below certain thresholds health suffers, especially with children, the elderly or the sick at home. And then there are those who simply don't get any visitors.

Head, hands and feet: where the battle is lost

A well-wrapped torso is no use if your fingers seize up on the keyboard. The consensus on the extremities is unanimous: hat, gloves and good socks. The recurring anecdote is the mouse hand turning into a fish straight out of the fridge. Changing your bedding —swapping two blankets for a down duvet— also transforms how warm you feel without touching the thermostat.

The underlying doubt remains. With cheap technical clothing, well-planned layers and a 50-watt electric blanket, anyone can get through January without switching on the heating. The question is how many are willing to do it out of conviction, and how many only because the boiler is still broken.