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Sleeping mat R-values explained

Sleeping mat R-values explained

By the Canvasdale team · Last checked 21 October 2026

Weather: A guide, not a guarantee. British weather changes fast: check the forecast before you go, know how to get off site in bad weather, and don't rely on this figure alone.

On this page

The short answer
How the ratings work
What to look for
Layering and tips
FAQs

The short answer

How the ratings work

What to look for

Layering and tips

FAQs

Work it out: the sleeping bag rating finder does this sum for your own trip, with every figure editable.

Worked example: Look for a comfort rating of 3 °C or lower.

Open the sleeping bag rating finder

Check before you go

The forecast for the site itself, the day before and on the morning you leave.
The site's rules on arrival times, dogs, noise, gas and pitch use.
Fire rules: whether fires, fire pits or BBQs are allowed, on the site and in the area.

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Canvasdale is an independent UK camping site for families, couples and first-timers. Every figure is a planning guide: check your kit maker's figures, the forecast and the site's rules before you go. We don't test products.

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