The Savings Principle

Heat the Human, Not the House.

Your furnace heats every room you're not in. Thermal clothing heats you. One of those is expensive. Use the calculator below to see what yours costs.

~3%
saved per °F
you set back (DOE)
$1,011
avg. US heating bill
winter 2025–26
19,000+
verified customer
reviews
Your Savings

Run the numbers on your house

The U.S. Department of Energy says you can save up to 10% a year by setting your thermostat back 10–15°F for 8 hours a day. That works out to roughly 1% per degree. Keep the thermostat lower around the clock and the savings are larger: real thermostat data from EnergyHub showed over 5% per degree in Michigan.

The average American household spent $1,011 heating their home last winter (NEADA, February 2026). Even a small thermostat drop adds up over a six-month season.

Enter your own numbers. The math scales the same way on every bill.

These estimates are conservative. The calculator uses 3% per degree, the middle of the 1–5% range found across DOE guidance and real-world thermostat studies. Your results depend on your insulation, heating system, and climate.

What could you save?

Your total monthly utility bill $300
Heating is typically 40–50% of your winter bill. The calculator applies this automatically.
Degrees you'd lower
~$12/mo
estimated monthly savings
That’s ~$73 over a 6-month heating season
A pair of socks and a base layer pays for itself in weeks.
How this works: we estimate 45% of your bill goes to heating, and apply a 3% savings rate per degree based on DOE guidance and EnergyHub thermostat data. Your actual savings may be higher or lower.
Shop the At-Home Collection →
The Home Warmth Kit

What to wear instead of turning up the heat

Socks. Base layer. Blanket. Three pieces, and most people drop a few degrees without thinking about it.

2.3 TOG
Foundation

ORIGINAL Crew Socks

Maximum warmth. 7× warmer than cotton. Long-loop thermal pile. Non-binding top.

Men's → Women's →
1.6 TOG
All-day

LITE Crew Socks

All-day warmth. 5× warmer than cotton. Thinner profile fits shoes and slippers.

Shop LITE →
Core

ORIGINAL Base Layer Top

Heavy-weight thermal. Sits under a shirt or sweater. Invisible on a video call.

Men's → Women's →
Grip

Ankle Slipper Socks

Thermal warmth. Non-slip sole. Hard floors handled.

Men's → Women's →
Couch

Oversized Throw/Blanket

HeatWeaver-lined thermal throw. Warm enough to leave the thermostat alone.

Shop Throws →
Heat Holders Super Plush Thermal Blanket King Size Ivory #color_ivory
Bed

Super Plush Blanket

The blanket customers say feels "like it has electricity attached." Full, queen, and king.

Shop Super Plush →
All-over

Mega Hoodie

Oversized wearable blanket. One customer went from 74°F to 70°F and stayed there.

Shop Mega Hoodie →
Night

Flannel Pajama Pants

Brushed flannel. Cooler bedroom, warm legs.

Men's → Women's →
Real People, Real Bills

The phrase came from a customer

Norrie N. from Texas wrote it in a review of her slipper socks. October 2022. She wasn't quoting marketing copy. She was describing what she does.

"I definitely agree, Heat the Human, Not the House. With climate change comes colder winters. Its not unusual in TX to see temps below freezing. With rising natural gas prices, I have stocked up on these slipper socks to keep my utility bill down."Norrie N., Slipper Socks

She is not alone. Sixteen published reviews mention it unprompted: thermostat down, socks on, bill lower. People have been writing this since 2014.

19,000+
verified customer reviews
7×
warmer than cotton. Lab-tested TOG, not a marketing claim.
Since 2014
customers telling us they turned the thermostat down
What customers are saying
"You can turn down the thermostat!" Brian
"we were able to turn the thermostat down!" Kathleen S.
"We don't even turn the heat on in our bedroom" Joseph M.
"It helps keep the heating bills down." Sandra N.
"I can easily keep my thermostat on 68" Cheri G.
"drafty house with cold floors...no chill" Stacy S.
"comfortable for the first time this winter" Ann G.
"keeps her feet warm and the furnace down" Larry C.
The Warmth Guide

Everything you need. Nothing you don't.

Why warming yourself costs less

Your furnace doesn't know you're on the couch. It heats the bathroom, the hallway, and the ceiling at the same rate. You're paying to warm rooms nobody is sitting in.

Thermal clothing reverses the equation. Instead of warming the air around you, you trap the heat your body already produces. No electricity. No batteries. Just better insulation on the human instead of the house.

The savings rule

The U.S. Department of Energy says you can save up to 10% a year by setting your thermostat back 10–15°F for 8 hours a day. The industry shorthand: roughly 1% per degree. Keep it lower around the clock and the savings grow. Real thermostat data from EnergyHub showed over 5% per degree in Michigan.

Three degrees down. On the average US heating bill of $1,011 per season (NEADA, February 2026), that's roughly $91 back in your pocket.

Heating costs rose 11% last winter. The numbers only get more persuasive.

Why "put on a sweater" doesn't cut it

Everyone says it. Nobody specifies which sweater.

A cotton sock scores 0.3 TOG (the lab measure of thermal insulation). Heat Holders ORIGINAL socks score 2.3 TOG. Seven times warmer. That's the difference between needing the furnace at 72°F and being comfortable at 68°F.

Cotton absorbs moisture and holds it against your skin. Damp fabric cools you instead of warming you. Thermal pile manages moisture and traps still air close to skin. Different material, different result.

The 1% per degree estimate is conservative. Real thermostat data from EnergyHub showed savings above 5% per degree in Michigan winters. Lower thermostat, lower bill. The direction never changes.

The home warmth kit

Socks. Base layer. Blanket. Three pieces, and most people drop 3°F without thinking about it.

Start at the feet

Cold feet make the whole body feel cold. Socks are the single highest-impact change.

ORIGINAL Crew Socks Men's → Women's →

LITE Crew Socks Shop LITE →

Add a base layer

Traps core heat under your regular clothes. The piece that lets you sit at a desk in a 66°F house and not think about it.

ORIGINAL Base Layer Top Men's → Women's →

Slipper socks for hard floors

Tile, hardwood, and laminate pull heat from your feet by conduction. Slipper socks add a gripper sole.

Ankle Slipper Socks Men's → Women's →

A blanket that earns its keep

For evenings. HeatWeaver lining traps warmth the same way the socks do, scaled up.

Oversized Throw/Blanket Shop Throws →

Super Plush Blanket Shop Super Plush →

The full evening kit

Mega Hoodie Shop Mega Hoodie →

Flannel Pajama Pants Men's → Women's →

Shop the at-home range → Throws & blankets Slipper socks Pajamas

Room by room

Different rooms lose heat differently. Match the kit to the zone.

Living room

Sitting still drops your metabolic heat production. The room that felt fine while you were cooking feels cold the moment you sit down. ORIGINAL socks or slipper socks on the feet. A throw or Mega Hoodie over the top. That covers the two places heat leaves fastest: feet and core.

"Hands down the warmest blanket we've ever bought! We don't even turn the heat on in our bedroom and it keeps us warm as toast!"Joseph M., Super Plush Blanket

Home office

You're stationary for hours. Your feet cool first, then your hands. The base layer is the key piece here: core warmth under work clothes, no bulk, no change on camera. Pair with ORIGINAL or LITE socks. Slipper socks if you're on hard floors.

"I have a drafty house with cold floors and I'm able to walk around in these without any chill. I work from home, so I wear these all day."Stacy S., ORIGINAL Crew Socks

Bedroom

A cooler bedroom is better for sleep. Research on sleep thermoregulation recommends 60–67°F for optimal sleep (Okamoto-Mizuno & Mizuno, 2012, Journal of Physiological Anthropology). The Super Plush Blanket handles the bed. For cold feet, put on warm, non-restrictive socks 20–30 minutes before you turn in. Heat Holders sleep socks (women's) or ORIGINAL crew socks (men's and women's) both work. Warm feet trigger vasodilation, which helps lower core temperature and signals sleep onset (Kräuchi et al., 1999, Nature).

Flannel pajama pants complete the kit. Cooler room, lower bill, better sleep.

Cold Feet at Night: the sleep guide →

Your house. Your situation.

Not every cold house is cold for the same reason.

The drafty old house

Old walls, old windows, heat leaving through every gap. Insulation costs thousands and you might not own the place. Thermal clothing is the immediate answer: personal insulation for the house you have, not the house you wish you had.

"I live in an old New England house where the thermostat is kept ~60°F all winter and the 'thermal' windows still let drafts in. I'm wearing one of the women's original base layer tops and feel comfortable for the first time this winter!"Ann G., ORIGINAL Base Layer Top

ORIGINAL tier. 2.3 TOG socks, heavy-weight base layers. Built for the widest gap between what your house gives you and what you need.

The apartment you can't control

Shared heating. Landlord's thermostat. Radiators that cycle on someone else's schedule. Thermal clothing puts warmth on your terms.

"My apartment is freezing and drafty in the cold winters. These socks are amazing for keeping my legs super warm."Denise B., ORIGINAL Boot Socks

Socks and a base layer. Two pieces that close the gap a badly timed radiator leaves open.

Energy-conscious by choice

Your house isn't broken. You've set the thermostat to 65°F because you'd rather keep the money. The calculator above was built for you. You know what your bill is. You know what you'd like it to be. The kit is the bridge.

"previously would have been inclined to turn up the furnace, but now these socks make me so warm (after a while even too hot) I can easily keep my thermostat on 68, and I have much improved heat bills"Cheri G., LITE Crew Socks

The California surprise

California surprises people. But many California homes were built without serious insulation or central heating, because the assumption was that the climate didn't need it. When nights drop into the 40s and 50s, those houses get cold fast.

LITE socks (1.6 TOG, 5× warmer than cotton) are often the right starting point. Meaningful warmth without the bulk of the ORIGINAL tier, which can be too much when afternoons climb back up.

Customers have been doing this for over a decade. Reviews mentioning thermostats, drafty homes, and lower bills go back to 2013. Not a trend. A proven approach.

Common Questions

Frequently asked questions

The U.S. Department of Energy says you can save up to 10% a year on heating by setting your thermostat back 10–15°F for 8 hours a day. The industry shorthand is roughly 1% per degree. Keep it lower around the clock and the savings are larger. EnergyHub analyzed real thermostat data across Michigan and found savings above 5% per degree, well above the DOE baseline. On the average US winter heating bill of $1,011 (NEADA, February 2026), a 3°F full-day drop could save roughly $91 across the season. Your exact number depends on your insulation, heating system type, fuel source, and climate. Poorly insulated homes lose heat faster, which means your furnace runs more, which means the savings from each degree are bigger, not smaller. Use the calculator on this page with your own utility bill to see what the math looks like for your house.
Yes, and it's measurable. Heat Holders ORIGINAL socks rate 2.3 TOG (Thermal Overall Grade), which is 7 times warmer than a standard cotton sock at 0.3 TOG. That gap matters because of how the materials work differently. Cotton absorbs moisture from your skin and holds it. Damp fabric conducts heat away from your foot instead of retaining it. By mid-morning in a cold house, a cotton sock is actively cooling you. Thermal pile does the opposite: the long-loop brushed interior traps still air close to your skin (still air is one of the best insulators there is) while managing moisture so it moves away rather than sitting against your foot. The result is warmth that lasts through the day, not warmth that fades after an hour. Customers in drafty homes, cold apartments, and houses where the thermostat is deliberately set low report the same thing: the space heater gets unplugged and the thermostat stays down.
Start at the feet. Cold feet make the whole body feel cold regardless of room temperature, and thermal socks are the single highest-impact change you can make. ORIGINAL socks (2.3 TOG, 7 times warmer than cotton) for maximum warmth, or LITE (1.6 TOG, 5 times warmer) for a thinner profile you can wear all day in shoes or slippers. Next, add a base layer top under your regular clothing. It traps core body heat without adding visible bulk, and it’s the piece that makes a 66°F house feel like a 70°F house. For hard floors (tile, hardwood, laminate), slipper socks add a non-slip gripper sole to the thermal sock. For evenings on the couch or in bed, a HeatWeaver-lined throw or blanket replaces the need to heat the room. Customers consistently tell us the full kit (socks, base layer, blanket) lets them lower the thermostat without discomfort.
Yes, and drafty houses are where it makes the biggest difference. Drafts cool you in two ways: cold air moves across exposed skin (convection), and cold surfaces like single-pane windows and uninsulated floors pull heat from your body by conduction. Home insulation solves this by improving the house. Thermal clothing solves it by improving the human. A base layer top creates a still-air barrier across your core. ORIGINAL socks do the same for your feet. The thermal pile traps warm air next to your skin, which is the same principle wall insulation uses, just applied to you instead of the studs. Customers in older New England homes, prewar apartments, and houses with single-pane windows report that ORIGINAL-tier products close the gap between what their house provides and what they need. It won't fix the draft, but it will stop the draft from dictating your thermostat setting.
Heat Holders measures warmth using the TOG (Thermal Overall Grade) rating system, which tests how effectively a fabric resists heat flow. Higher TOG means less of your body heat escapes through the sock. A regular cotton sock scores about 0.3 TOG. Heat Holders ORIGINAL socks score 2.3 TOG: 7 times warmer. LITE socks score 1.6 TOG: 5 times warmer. ULTRA LITE socks score 1.0 TOG: 3 times warmer. In practical terms, the ORIGINAL is the sock for being still in a cold house: couch, desk, bed. The LITE is for all-day wear when you're moving around or need a thinner profile for shoes. The ULTRA LITE fits dress shoes and work footwear. The warmth difference between cotton and even the thinnest Heat Holders sock is significant. The difference between cotton and the ORIGINAL is transformative.
For most healthy adults, yes. The World Health Organization’s Housing and Health Guidelines (2018) recommend a minimum indoor temperature of 64°F (18°C) to protect general health. Below that threshold, the evidence shows increased risks for respiratory and cardiovascular issues. For older adults, young children, and people with chronic respiratory or cardiovascular conditions, the WHO’s earlier 1987 guidance and the U.S. National Institute on Aging both recommend at least 68°F (20°C). Keeping the temperature lower than these thresholds is where the risk lies. Thermal clothing is not about making a dangerously cold house tolerable. It’s about staying comfortable at temperatures that are already safe, the 65–68°F range that the DOE recommends for energy savings. The savings come from dropping a few degrees within the recommended range, not from pushing below it.

Heat Holders is a warmth brand, not an energy consultancy. Savings estimates on this page are based on publicly available guidance from the U.S. Department of Energy and heating cost data from the National Energy Assistance Directors Association. Individual savings depend on your insulation, heating system, energy prices, and climate.

Last updated August 2026.