Rab Ionosphere 5.5 Sleep Mat - Regular
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Product Information
Full details
The Rab Ionosphere 5.5 Sleep Mat is designed for winter alpinists, mountain trekkers, and fastpackers who require a high-performance, lightweight sleeping surface for extreme cold. Its primary benefit is a superior 5.5 R-value achieved through a combination of TILT heat-reflective lining and Stratus R insulation, providing exceptional warmth without excessive weight. While it offers excellent thermal efficiency, the minimalist 20D fabric requires careful site selection to avoid sharp debris that could compromise the air-tight construction.
All features
| Model Part Number | 003973513 |
|---|---|
| Brand | Rab |
Extended Product Information
FAQs
What is the R-value of the Ionosphere 5.5?
The Ionosphere 5.5 has an R-value of 5.5, making it suitable for winter and extreme alpine conditions.
Is the pump sack included?
Yes, a dedicated pump sack is included for rapid, moisture-free inflation.
How thick is the mat when inflated?
The mat is 8cm thick, providing a comfortable cushion and excellent ground insulation.
What is the size of the regular model?
The regular size measures 183cm in length by 51cm in width.
Can I use this for summer camping?
While it can be used in summer, the insulation levels are specifically engineered for cold and winter environments. You may find it warmer than necessary for hot summer nights.
What should I do if I get a puncture?
Use the provided repair kit included with the mat. Clean the area around the puncture, apply the adhesive patch, and allow it to cure for the recommended time before re-inflating.
Troubleshooting
Mat feels like it is losing air overnight
First ensure the two-way valve is fully closed and securely pushed in. If air continues to leak, submerge the inflated mat in water or use soapy water to locate bubbles, then use the provided repair kit.
Difficult to deflate quickly
Ensure the valve is set to the full deflation position and press firmly on the mattress corners to force air out. Do not over-compress the mat while rolling.
Pros and Cons
Pros
- High R-value of 5.5 for reliable winter performance
- Compact and lightweight for multi-day mountaineering
- Included pump sack makes setup quick and easy
- Rectangular design offers more usable sleeping area than tapered mats
- Excellent balance of insulation and pack volume
Cons
- 20D top fabric requires caution on rocky terrain
- Not intended for ultralight summer-only use
- Slightly heavier than minimalist foam alternatives
Setup, Compatibility & Care
To set up your mat, attach the included pump sack to the low-profile valve, fill the sack with air, and roll it toward the valve to transfer air into the mattress. Repeat this process until you reach your desired firmness. When packing the mat, open the valve fully to let the air escape, then roll the mat tightly from the bottom upward, ensuring the air is pushed out toward the valve. Always use the provided repair kit for small punctures. For cleaning, wipe down the mat with a damp cloth and mild soap; ensure it is completely dry before storing it in the included stuff sack. Store the mat unrolled and with the valve open to preserve the integrity of the internal insulation.