The Naturehike sleeping bags are made with Elevation Insulation. The sleeping bag uses a 2-layer offset construction, sometimes called a "bag within a bag." The contoured hood and mummy shape helps seal up your warmth and keep you warmer. The Naturehike is a great backpacking sleeping bag to take along on your hikes that won't take up all the space in your pack. 

SPECS

Elevation insulation
Two-layer offset construction
Multiple sizes and temperatures
20D 380T Nylon ripstop waterproof outer fabric ; Soft Breathable 240T Polyester Pongee Liner
Filling: Soft cotton flannel with SuperLoft Elite 350g/m2 hollow Cotton fiber insulation for warmth
Double-layer construction entire width and length of bag increases warmth and durability
Product Weight approximately: 1.35kg( 2.97lbs )
Product Dimensions: 210 x 80 CM (83 x 31 inches)
Limited temperature approximately :5℃ ~ 10℃

Features:

Type: 3-season sleeping bag for winter and autumn, spring
Outdoor Sleeping Bag, Water-resistant/Windproof/Warm/Cold-resistant
Lightweight and breathable, Super soft and warm
Portable, convenient to carry
 Stop the wind and keep warm at night
Suitable for camping, hiking, walking, travelling, trekking and any other outdoor sports .