Dyneema Stove Stuff Sacks. Made of ultralight 1.0 Dyneema fabric. 

Specs:

• Small Stove Stuff Sack
  Perfect for the popular BRS stove
  Size Flat: 3.75x3"
  Weight: .07 ounces
• Medium Stove Stuff Sack
  Perfect for most other ultralight hiking stove
  Size Flat: 3.4x3.75"
  Weight: .08 ounces
  
• Large Stove Stuff Sack
  Best for larger camping stoves
  Size Flat: 4.5x4.75"
  Weight: .11 ounces