Ultralight Comfort for Every Adventure

The Exped SIM Ultra 3.8 is a self-inflating, ultralight sleeping mat designed for outdoor enthusiasts seeking comfort without added weight. Ideal for backpacking, trekking, and camping, this mat features full horizontal and vertical coring of the foam to reduce weight and pack size, while the recycled ripstop outer material ensures durability. With a thickness of 3.8 cm, it provides a flat and comfortable sleep surface, insulating against the cold ground. The mat is equipped with Exped's FlatValves for easy inflation and deflation. Available in multiple sizes to suit various needs.

Features

• Ultralight and compact design
• Self-inflating with foam insulation for a flat sleep surface
• Recycled ripstop outer material for durability
• Full horizontal and vertical coring of the foam to reduce weight and pack size
• Equipped with Exped's FlatValves for easy inflation and deflation

Specifications

• R-Value: 3.7
• Temperature Rating: -10 °C
• Thickness: 3.8 cm
• Dimensions: 183 x 50 cm; Claimed Weight: 610 g
  
• Materials:
  • Recycled 20 D polyester, Oeko-Tex® 100 certified, TPU film laminate, DWR free
  • Insulation: 13 kg/m³ PU foam, Oeko-Tex® 100 tested
• Weight Mat: 570 g
• Weight Packsack: 21 g
• Packed height: 27 cm
• Packed diameter: 16 cm
• Pack volume: 5.4 l
  

For a guide on how to buy a sleeping mat, click here.