A tent pitched below a snow-capped ridge at dusk

Down sleep systems · United Kingdom

Sleep warm when it turns cold.

Down bags sold on the figures that decide how warm you actually are — fill weight, down type, dimensions. Never a temperature nobody tested.

Choosing a bag

Buy by grams, not by guesswork.

Fill weight is the mass of down inside. It is the one figure that compares honestly against every bag on the market — including laboratory-tested ones.

A tent at sunrise with a sleeping bag laid out beside it

400

grams fill

Mild summer nights, hostels and bothies. Packs small. Not for frost.

600

grams fill

Late spring to early autumn in the UK, and van nights out of the wind.

800

grams fill

Cool three-season nights, cold ground and damp mornings.

1200

grams fill

Winter nights under canvas and exposed pitches after dark.

2000

grams fill

Expedition use and altitude, where being cold becomes a problem.

These are our own recommendations, not tested ratings. Between two? Take the heavier one — a warm bag can be opened, a cold one cannot be fixed at three in the morning. Full fill guide →

In the range now

Northern Warmth Emergency Bivvy Bag

Northern Warmth Emergency Bivvy Bag

£12.99

Northern Warmth Envelope Down Sleeping Bag

Northern Warmth Envelope Down Sleeping Bag

£99.00

Northern Warmth Expedition Down Sleeping Bag

Northern Warmth Expedition Down Sleeping Bag

£179.00

Northern Warmth Inflatable Sleeping Mat

Northern Warmth Inflatable Sleeping Mat

£44.99

Northern Warmth Mummy Down Sleeping Bag

Northern Warmth Mummy Down Sleeping Bag

£99.00

Northern Warmth Ultralight Bivvy Tent

Northern Warmth Ultralight Bivvy Tent

£89.99

Northern Warmth Wide Inflatable Sleeping Mat

Northern Warmth Wide Inflatable Sleeping Mat

£59.99
A tent at sunrise with a sleeping bag laid out beside it

Why we exist

The cold does not care what the label said.

Most bags in this price band carry a comfort figure nobody ever tested. We would rather hand you the measurements and let you decide than print a number we cannot defend at four in the morning.

A camper shaking out a down sleeping bag on bare rock in the mountains

Our promise

What you can hold us to.

Free UK delivery

On every order, no minimum. Tracked end to end from dispatch.

30 days to return

Twice the legal minimum. No reason needed, refunded in five working days.

Only confirmed figures

Every number on a listing comes from the manufacturer. Where one is not confirmed, we leave it out rather than estimate.

Nothing on delivery

Taxes included at checkout on orders under £135. No surprise bill at the door.

A lit tent under a starry night sky

Our position

We refuse to print a temperature we did not test.

A comfort rating means something only when a laboratory has tested the bag to ISO 23537. Most bags at this price never were — the figure is copied off a supplier sheet and passed from shop to shop.

Look across this price band and the same physical bag is sold as −10 °C by one shop and −20 °C by another. Both cannot be true.

So we publish only what the manufacturer states and we can stand behind: the down type, the fill weight in grams, the lining, the dimensions — and the conditions in plain words.

Read our full position
A tent glowing from within at night beside a lake

Questions

The things people ask first.

Why is there no temperature rating on your bags?

Because we have not had them laboratory-tested to ISO 23537, and a comfort figure without a test is a guess presented as data. We publish the fill weight, the down type and the dimensions instead, and describe the conditions in words. Read the full position →

How long does delivery take?

Orders are processed in 1–3 working days, then 7–14 working days to arrive, tracked throughout. We ship directly from our fulfilment partners in Asia, which is why the same specification costs less here and why it takes longer than a domestic warehouse. Shipping policy →

Will I be charged anything on delivery?

On orders under £135, no — UK VAT is already included in the price you pay. On orders of £135 or more the carrier may collect import VAT; send us the receipt and we reimburse it in full.

Which fill weight should I buy?

400 g for mild summer nights, 600 g for UK spring and autumn, 800 g for cool three-season use, 1000–1200 g for winter, 1500 g and above for frost and expedition use. These are our recommendations rather than tested ratings. If you are between two, take the heavier one. Full fill guide →

Do I need a mat as well?

Yes, if you are sleeping on the ground. Down compressed under your body loses almost all of its loft, so the underside of the bag insulates you barely at all — the mat is what stops the ground taking your heat. See the mats →

Can I return a bag if it is not right?

Yes — 30 days from delivery, unused and in its packaging. That is twice the legal minimum. Refunds go back to your original payment method within five working days of us receiving it. Returns policy →

How do I wash a down bag without ruining it?

Rarely, and never dry clean. Use a down-specific detergent on a cold gentle cycle, then tumble dry low with two clean tennis balls until the clusters separate — expect two or three cycles. Store it loose, never compressed.