Ultrasphere 5 Sleep Mat

$255.00

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Ultrasphere 5 Sleep Mat

$255.00

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Delivery and returns Delivery
Rab Promise

From bikepacking through mountain ranges to multi-day trail running, this air mat offers a peerless warmth-to-weight ratio for ultralight missions.

R-value: 5.5. Heat Reflective TILT.

Activities:
Fast & light adventures
Mountaineering
Trekking

Shape:
Tapered Mummy
Size Guide

Weight:
12.2oz/345g (Reg)

R-value:
5.5

Packed size:
7.1in x 3.5in (18cm x 9cm)

Dimensions:
Regular: 183cm x 51cm x 8cm. Regular wide: 183cm x 64cm x 8cm. Long wide: 196cm x 64cm x 8cm.

This unique guarantee promises to support you before, during and after your adventure, combining gear advice, aftercare services, and our Rab Warranty, to help you get more out of your gear.

For more information, please visit our Rab Promise page.

Features

Weight12.2oz/345g (Reg)
DimensionsRegular: 183cm x 51cm x 8cm. Regular wide: 183cm x 64cm x 8cm. Long wide: 196cm x 64cm x 8cm.
R-value5.5
Packed size7.1in x 3.5in (18cm x 9cm)
Product codeQMA-13

When both warmth and low weight are crucial, the Ultrasphere 5 is the ultimate packable, featherlight air mat, honed for fast-paced exploring in demanding mountain conditions. Its groundbreaking design includes two layers of TILT, which boosts the mat’s warmth-to-weight ratio by reflecting heat back towards your body, all for a fraction of a gram. It also features new offset air chambers that trap heat within the construction, allowing you to recharge comfortably without the need for high-volume insulation. Highly comfortable and supportive, the Ultrasphere 5 is the ideal foundation for thru-hiking, bikepacking, and multi-day mountain runs.

Impressively light at just 345g (size regular), with uncompromised warmth at an R-value of 5.5.
The new weight-saving construction uses offset air chambers to trap heat and keep you warm.
Two layers of heat-reflective TILT reduce radiant heat loss without adding weight.
Comfortable tapered mummy shape that eliminates unnecessary bulk.
Soft, exceptionally lightweight 20D fabric.
When it’s time to pitch for the night, the two-way valve and inflation sack make camp setup quick and easy.
Thickness: 8cm.
Packed size: 18x9cm.
Roll-away stuff sack with repair kit included.

Material Facts

Ultrasphere 5 Sleep Mat

	Recycled	PFAS PFAS This column shows where fluorocarbons (PFAS) may still be present in our products. No PFAS means we’ve phased out all intentionally added PFAS from the corresponding component and are compliant with current EU and US legislation.
Total content Total content The total percentage of an item's weight that is recycled.	17%	No
Fabric Fabric Some of our products use multiple fabrics, especially waterproof items. This figure shows the total percentage of an item's fabrics which are recycled, calculated by weight.	14%	No
Outer	33%	No
Yarns	100%	No
Coatings	0%	No
Second outer	0%	No
Zips Zips This figure includes zipper tape, teeth, sliders, and pullers, showing their total recycled content by weight.	100%	No
Trims Trims This section shows the recycled content by weight for all components added to our products that are not captured in the other categories. For example, cord locks, pocket linings, buttons, cords, size labels, and eyelets.	23%	No
Renewable energy
Product manufacturing	41%
Manufactured in China
*Calculations based upon the weight of a regular length sleeping bag.
QMA-13 Version 09/2025

Material Facts is the way forward.

We’re helping you to make informed choices by giving you the raw data. Clear. Concise. Honest.

Learn More

Tech and features.

Features

Weight12.2oz/345g (Reg)
DimensionsRegular: 183cm x 51cm x 8cm. Regular wide: 183cm x 64cm x 8cm. Long wide: 196cm x 64cm x 8cm.
R-value5.5
Packed size7.1in x 3.5in (18cm x 9cm)
Product codeQMA-13

Impressively light at just 345g (size regular), with uncompromised warmth at an R-value of 5.5.
The new weight-saving construction uses offset air chambers to trap heat and keep you warm.
Two layers of heat-reflective TILT reduce radiant heat loss without adding weight.
Comfortable tapered mummy shape that eliminates unnecessary bulk.
Soft, exceptionally lightweight 20D fabric.
When it’s time to pitch for the night, the two-way valve and inflation sack make camp setup quick and easy.
Thickness: 8cm.
Packed size: 18x9cm.
Roll-away stuff sack with repair kit included.