The Ultralight Self-Inflating Sleeping Mat by Sea to Summit is the go-to choice for lightweight travelers who value a comfortable night's sleep without the added weight and bulk. This mat features a host of innovative technologies and thoughtful design elements that make it a top pick for ultralight adventurers. With an R-Value of 2.6, it provides sufficient insulation for late spring through early fall use, ensuring you stay warm and cozy during your camping trips.


  • Delta Core-V Technology: The mat utilizes Delta Core-V technology, which focuses on removing small sections of foam where it matters less, allowing for better support and packability. It keeps your body contact areas warmer while providing excellent support.
  • Durable Face Fabric: The mat features a woven 30D polyester face fabric chosen for its lightness and strength, ensuring durability and reliability during your adventures.
  • Silicone Grip Print: An embossed silicone grip print prevents your sleeping bag from slipping on the pad and the pad from sliding on the tent floor, keeping you securely in place during the night.
  • Multi-Function Valve: The flip-over multi-function valve enables quick and easy inflation, deflation, and fine-tuning of air pressure. It's a patent-pending design that ensures easy setup and pack-up.
  • PillowLock System: The mat includes the PillowLock system, preventing your Sea to Summit Aeros Pillow from slipping during the night, so you can enjoy a comfortable and restful sleep.
  • XS Pad Option: The XS pad is ideal for minimalists, as it can be used under your head and chest, while your backpack can be placed under your lower legs, offering a super-packable ultralight sleeping solution.


  • SIZE: Small
  • DIMENSIONS: 170 x 51 cm
  • PACKED SIZE: 12 x 28 cm
  • WEIGHT: 520 g

The Sea to Summit Ultralight SI Mat is your ideal companion for lightweight travel, offering exceptional comfort, warmth, and packability for late spring through early fall camping. With innovative technologies and a thoughtful design, this mat is perfect for gram counters who prioritize a comfortable night's sleep during their outdoor adventures.


Barcode # 9327868066964

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