Exped SIM Ultra 3.8 LW Self-Inflating Sleeping Mat - Green

Waking up with a sore back and cold hips can ruin an outdoor adventure. The Exped SIM Ultra 3.8 LW self-inflating sleeping mat provides the support and insulation you need for a restful night under the stars. Its generous length and width offer ample space for side sleepers and taller individuals, while the 3.8 R-value ensures comfort in three-season conditions.

Who is it for

This mat is ideal for campers, hikers, and backpackers who prioritize comfort without sacrificing packability. It suits side sleepers, taller users (up to 196 cm), and those who prefer a rectangular sleeping surface with extra room to move. Perfect for car camping, canoe trips, and basecamp adventures where weight is less critical than a good night's sleep.

Main features

• Self-inflating open-cell PU foam core provides cushioning and insulation.
• R-value of 3.8 offers reliable warmth for spring, summer, and autumn.
• Rectangular shape with 197 cm length and 65 cm width – ideal for larger users.
• Durable 75D polyester shell with TPU film laminate is hydrolysis-resistant and Oeko-Tex certified.
• Exped Flat Valve allows rapid inflation and deflation, with fine-tuning of firmness.
• Includes stuff sack and repair kit for easy transport and on-the-go fixes.

Specifications

• Type: Self-Inflating Sleeping Mat
• R-Value: 3.8
• Temperature Rating: -10 °C
• Thickness: 3.8 cm
• Length: 197 cm
• Width: 65 cm
• Shape: Rectangular
• Top Fabric: 75D Polyester, TPU film laminate
• Bottom Fabric: 75D Polyester, TPU film laminate
• Insulation: Open-cell PU foam
• Valve Type: Exped Flat Valve
• Packed Dimensions: 33 x 16 cm
• Packed Volume: 6.6 L
• Colour: Green
• Season Rating: 3-Season
• Included Accessories: Stuff sack, Repair kit
• Oeko-Tex Certified: Yes
• Hydrolysis Resistant: Yes

Tips

For best performance, unroll the mat and open the valve at least 30 minutes before use to allow full self-inflation. Adjust firmness by adding a few breaths or releasing air as needed. Store the mat unrolled with the valve open in a dry place to preserve foam loft.