Ever since their founder hand-stitched his first sleeping bag more than 40 years ago, Rab have been helping weary adventurers catch vital rest in the world's most hostile environments. Now, applying their decades of expertise and ground-breaking technologies, they've crafted a new range of lightweight, packable sleepmats. 

When you need reliable insulation in a lightweight package, the Stratosphere 4 sleep mat balances maximum warmth and minimum weight for all-mountain use. It features recycled Stratus™ R insulation designed to trap air and reduce heat loss through convection, helping to maintain your temperature when the mercury drops. 

Robust and compact, it's the ideal companion for your trekking, climbing and backpacking adventures. 

The specifics: 

• R-Value: 3.8 
• Dimensions: Regular 183x51x8cm. Large 196x64x8cm. 
• Packed Size: Regular 24x12cm. Large 30x15cm. 
• Weight: Regular 695g. Large 950g. 
• Main Fabric: 75D recycled polyester outer fabric with internal TPU coating and fluorocarbon-free DWR 
• Insulation: Stratus™ R 100% recycled polyester 160gsm 

For your chance to win a Stratosphere 4 sleep mat, simply answer the question below.