Sea to Summit Ultralight XR Insulated Mat

Built for those who count every gram, the Sea to Summit Ultralight XR Insulated Air Mat delivers exceptional warmth and comfort without weighing down your pack. Designed for ultralight backpackers and fast-and-light adventurers, this next-generation sleeping mat is 14% lighter, 30% thicker, and 16% more insulating than previous versions, giving you more comfort and warmth for less weight on the trail.

Whether you’re pushing big miles on a thru-hike, bikepacking remote trails, or heading deep into the backcountry with a minimalist kit, the Ultralight XR packs down incredibly small while still providing reliable overnight insulation. The advanced Air Sprung Cell™ construction mimics the feel of a sprung mattress, allowing the mat to conform naturally to your body and distribute weight evenly. The result is fewer pressure points and greater stability, perfect for side sleepers and restless sleepers who still want a full night’s recovery after a long day on the move.

Light, compact, and engineered for efficiency, the Ultralight XR is the ideal sleep system upgrade for backpackers chasing maximum performance with minimal pack weight.

The ThermalCore insulation system reflects body heat back toward the sleeper for reliable performance in cold conditions, while a durable 30/40D face fabric and TPU internal laminate ensure proven field reliability. Built with RCS-certified recycled materials and bluesign® APPROVED fabrics, the Ultralight XR offers exceptional comfort with a lower environmental footprint. Whether you’re tackling a thru-hike or chasing alpine summits, this sleeping mat guarantees a warm, quiet, and restful night’s sleep, anywhere you roll it out.

Features

• 14% lighter, 30% thicker, and 16% more insulative than the previous model.
  
• Air Sprung Cell™ technology provides even weight distribution and eliminates pressure points for superior comfort—ideal for side sleepers.
  
• ThermalCore insulation with reflective TRM layer retains warmth and improves R-
• Value performance by 16%.
  
• Hybrid 30D/40D fabric with TPU laminate and Ultrafresh antimicrobial treatment ensures long-term durability and hygiene.
  
• RCS-certified recycled fabrics and bluesign® APPROVED materials reduce water, chemical, and energy use by approximately 30%.
  
• Compact packed volume—53% smaller than previous models for easy storage and portability.
  
• Includes field-repair kit with self-adhesive patches and a spare valve insert.
  
• Compatible with PillowLock™ system to keep your Sea to Summit Aeros Pillow securely in place.
  
• Backed by a proven 10-year field durability record for total confidence on any expedition.

Specifications

• Season Use: 3-Season
• Intended use: Ultralight adventures backpacking
• Colour: Yellow
• Compressed Size: Small: 19x10cm / Regular: 19x10cm / Large: 22 x 10.5cm
• Length: Small: 168cm / Regular: 183cm / Large: 198cm
• Width: Small: 55cm / Regular: 55cm / Large: 64cm
• Thickness: 6.5cm
• R-value: 3.6
• Weight: Small: 390g / Regular: 415g / Large: 530g
• Fabric: Durable 30D/40D nylon
  
• Pump Sack Weight: 60g