The Rab Ultrasphere 4.5 Sleep Mat - Regular is an ultralight and exceptionally warm inflatable sleeping mat designed for weight-conscious backpackers and mountain adventurers seeking a comfortable sleep on three-season expeditions. This innovative mat prioritizes both impressive warmth and packability, making it ideal for those who demand top performance without sacrificing portability on multi-day adventures.

When both warmth and low weight are crucial, the award-winning Ultrasphere 4.5 is the ultimate packable, featherlight air mat. Its ground-breaking design includes two layers of heat-reflective TILT, which reduce radiant heat loss, and offset air chambers that trap heat within the construction, allowing you to recharge comfortably without the need for high-volume insulation. Combined with a soft, exceptionally lightweight fabric, the mat’s weight-saving construction makes it ideal for bikepacking, thru-hiking, and multi-day mountain running.

With a comfortable tapered mummy shape that eliminates unnecessary bulk, the mat is thick and supportive, so that you can catch vital rest and restore the energy reserves needed for your action-fuelled days on the trail. When it’s time to pitch for the night, the low-profile two-way valve and inflation sack make camp setup quick and easy.

Rab Ultrasphere 4.5 Sleep Mat - Regular Features:

• Dual layers of Rab's TILT (Thermo Ionic Lining Technology) - a heat-reflective film that minimizes radiant heat loss.
• Offset air chambers that disrupt convection currents, trapping warm air within the mat's construction.
• High-quality 20D recycled polyester outer fabric - reduces weight without sacrificing durability.
• Impressive Packability: Despite its warmth, the Ultrasphere 4.5 Regular remains remarkably packable for a sleeping mat. It weighs approximately 370g and packs down to a compact 15 cm x 9 cm, easily fitting into most backpacks without adding significant bulk.
• Supportive Comfort: The rectangular shape with rounded corners creates a stable sleeping platform, while a tapered mummy design eliminates excess material and weight. This design minimizes tossing and turning, ensuring a restful sleep for a successful adventure.
• Durable Construction: Built to withstand demanding outdoor use, the Ultrasphere 4.5 Regular features a 20D recycled polyester outer fabric with a fluorocarbon-free DWR (Durable Water Repellent) finish. This eco-friendly coating repels moisture and protects the mat from abrasions, ensuring long-lasting performance on the trail.
• Quick and Easy Inflation: The low-profile two-way valve allows for efficient inflation and deflation, letting you quickly adjust the firmness of the mat to your comfort level. The included pump sack simplifies inflating the mat, saving you time and effort when setting up camp.
• Sustainable Choice: Rab prioritizes sustainability. The Ultrasphere 4.5 Regular features recycled materials in the outer fabric and insulation, along with a fluorocarbon-free DWR treatment, minimizing environmental impact.

Rab Ultrasphere 4.5 Sleep Mat - Regular Specifications:

Weight: 370g
Main Fabric: 20D Recycled Polyester outer fabric with internal TPU Coating and fluorocarbon free DWR
R-Value: 4.3
Thickness: 8 cm
Dimensions: 183 L x 51 W x 8 H cm.
Packed Size: 15 cm x 9 cm
Includes: Roll-away stuff sack with repair kit