




The Rab Ionosphere 5.5 Sleep Mat is engineered with precision to deliver exceptional warmth in a compact size, this insulated air mat is ideal for alpinists and adventurers exploring in winter conditions. With a heat-reflective TILT lining and air-trapping Stratus™ R insulation, it reduces heat loss through both radiation and convection, offering you a comfortable sleep on frozen bivi ledges and clear nights at altitude. Low on weight, high on comfort, it thrives on long-distance ski tours, winter fastpacking trips, and multi-day ascents.
Rab Ionosphere 5.5 Sleep Mat Features:
- The TILT reflective film inside the mat reduces radiant heat loss, boosting warmth for weight.
- Stratus™ R insulation traps air to prevent heat escaping through convection.
- Soft-touch, lightweight 20D fabric on the upper mat, with a 30D base for added durability on rough ground.
- Oversized outer chambers to keep you central on the mat.
- The versatile rectangular shape is comfortable whatever your preferred sleeping position.
- Inflation and deflation are quick and easy thanks to the low-profile two-way valve and pump sack.
- R-value: 5.5.
- Thickness: 8cm.
- Roll-away stuff sack with repair kit included.
- Dimensions - Regular 183x51cm. Large 196x64cm.
- Packed size - Regular 24x12cm. Large 30x14cm.
Rab Ionosphere 5.5 Sleep Mat Specifications:
- Weight - 615g/21.7oz (Reg)
- Insulation - Stratus™ R insulation traps air and reduces heat loss from convective currents
- Dimensions - Regular: 183cm x 51cm x 8cm. Long wide: 196cm x 64cm x 8cm.
- R-value - 5.5
- Packed size - Regular: 24cm x 12cm (9.4in x 4.7in). Long wide: 29cm x 14cm (11.4in x 5.5in)
We aim to ship out all orders placed before 2pm the same working day! For shipments in the United Kingdom mainland, we use Royal Mail Tracked 24 service (DPD Next Day for larger items and items that weigh over 4KG). Please see our shipping policy for more details.
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