Best 40 Degree Sleeping Bags

Sleeping Bag 3 Seasons (Summer, Spring, Fall) Warm & Cool Weather - Lightweight,Waterproof Indoor & Outdoor Use for Kids, Teens & Adults for Camping Hiking, Backpacking and Survival (Emerald Green)

azark Premium Single Sleeping Bag, 350GSM, Lightweight and Waterproof, 4 Seasons of Camping, Hiking and Outdoors, Sleeping bag for Adults & Kids (Green)

Sleeping Bags for Adults Backpacking Lightweight Waterproof- 3 Seasons Cold Weather Sleeping Bag for Girls Boys Mens for Warm Camping Hiking Outdoor Travel Hunting with Compression Bags（Navy Blue）

BISINNA Sleeping Bag with Pillow - 4 Season Lightweight Waterproof Warm Sleeping Bag with a compression sack for Adults, Women, Men's Outdoors Camping, Hiking, Backpacking (4 Season/Blue/Right)

SAIL XL Sleeping Bag Extra Wide for Big & Tall Person 3-4 Season 2.7KG 400GSM Winter & Cool Weather Lightweight,Waterproof Indoor & Outdoor Use for Adults for Hiking, Backpacking and Camping - Black

Yaheetech Sleeping Bags with Hoods for Adults 3 Season Warm Lightweight Compression Sack Envelope/Rectangular Sleeping Bags for Single Person- Red

Trail Alpine 400 Hooded Winter Sleeping Bag, 3 to 4 Season Cold Weather Camping, Lightweight with Bag (Red)

Sleeping Bag - 3-4 Seasons Camping Sleeping Bags for Adults kids Girls Boys - Compact Sleeping Bag for Hiking, Backpacking, Cold Weather & Warm - Lightweight Waterproof Packable Travel Gear

QEZER Down Sleeping Bag 4 Season, Lightweight Winter Sleeping Bag 0 Degree to -12 Degree C for Adults and Kid Camping, Hiking and Backpacking Outdoor Filled 600+FP Down (black)

Highlander Winter Sleeping Bag for Adults - 3-4 Season Sleeping Bags - Thick 400gsm Double Layer Insulation for Cold Weather Camping - Thermal Hood with Draw Cord - Compressible Carry Bag