Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag
Inferno -40F/-40C Sleeping Bag

Inferno -40F/-40C Sleeping Bag

$77.00 $241.50
Size
Size Guide
✕

Men's Size Guide

Jackets & Tops

Chest Hips Sleeve Length
S 36-38 in 35-37 in 33.5 in
M 39-41 in 38-40 in 34.0 in
L 42-44 in 41-43 in 34.8 in
XL 45-48 in 44-46 in 35.5 in
2XL 49-52 in 47-49 in 36.3 in
3XL 53-56 in 50-52 in 37.0 in
2X 50-52 in 50.5-52.5 in 35-36 in
3X 54-56 in 54.5-56.5 in 35.75-36.75 in
4X 58-60 in 58.5-60.5 in 36.25-37.25 in
5X 62-64 in 62.5-64.5 in 36.75-37.75 in

Short-Sleeved Shirts

Chest Hips
S 36-38 in 35-37 in
M 39-41 in 38-40 in
L 42-44 in 41-43 in
XL 45-48 in 44-46 in
2XL 49-52 in 47-49 in
3XL 53-56 in 50-52 in

Pants

Waist Hip Inseam (Short) Inseam (Reg.) Inseam (Long)
30 (S) 29-30 in 35-36 in 29.5 in 31.5 in 33 in
32 (M) 31-32 in 37-38 in 30.0 in 32 in 34 in
34 (M) 33-34 in 39-40 in 30.0 in 32 in 34 in
36 (L) 35-36 in 37-38 in 30.0 in 32 in 34 in
38 (L) 37-38 in 43-44 in 30.5 in 32.5 in 34.5 in
40 (XL) 39-40 in 44-45 in 30.5 in 32.5 in 34.5 in
42 (XL) 41-42 in 46-47 in 30.5 in 32.5 in 34.5 in
44 (2XL) 43-44 in 50.5-52-5 in 30 in 32 in 34 in
2X 46-48 in 50.5-52-5 in 30 in 32 in 34 in
3X 50-52 in 54.5-56.5 in 30 in 32 in 34 in
4X 54-56 in 58.5-60.5 in 30 in 32 in 34 in
5X 58-60 in 62.5-64.5 in 30 in 32 in 34 in

Shorts

Waist Hips
30 (S)
 29-30 in 35-36 in
32 (M)
 31-32 in 37-38 in
34 (M)
 33-34 in 39-40 in
36 (L)
 35-36 in 37-38 in
38 (L)
 37-38 in 43-44 in
40 (XL)
 39-40 in 44-45 in
42 (XL)
 41-42 in 46-47 in
44 (2XL)
 43-44 in 47-48 in

Unisex Jackets & Tops

Chest Hips Arm Length
S
 36-38 in 35-37 in 33.5 in
M
 39-41 in 38-40 in 34.0 in
L
 42-44 in 41-43 in 34.8 in
XL
 45-48 in 44-46 in 35.5 in
2XL
 49-52 in 47-49 in 36.3 in
3XL
 53-56 in 50-52 in 37.0 in

Unisex Short-Sleeved Shirts

Chest Hips
S
 36-38 in 35-37 in
M
 39-41 in 38-40 in
L
 42-44 in 41-43 in
XL
 45-48 in 44-46 in
2XL
 49-52 in 47-49 in
3XL
 53-56 in 50-52 in

Shoes

US UK EU CM
7 6 39 25
7.5 6.5 40 25.5
8 7 40.5 26
8.5 7.5 41 26.5
9 8 42 27
9.5 8.5 42.5 27.5
10 9 43 28
10.5 9.5 44 28.5
11 10 44.5 29
11.5 10.5 45 29.5
12 11 45.5 30
12.5 11.5 46 30.5
13 12 47 31
13.5 12.5 47.5 31.5
14 13 48 32
14.5 13.5 49 32.5

Gloves

Circumference Length
S 7-7.5 in 6.5-7 in
M 8-8.5 in 7.8-8 in
L 9-9.5 in 8.5-9 in
XL 9.5+ in 9+ in

Hats

Head Circumference
ONE SIZE 21-23.5 in
S/M 21-22.5 in
L/XL 22.5-23.5 in

Women's Size Guide

Jackets & Tops

Chest Waist Hips Arm Length
XS 31-32 in 24-25 in 33-35 in 31.5 in
S 33-35 in 26-28 in 36-37 in 32 in
M 36-38 in 29-31 in 38-40 in 32.5 in
L 39-41 in 32-34 in 41-43 in 33.3 in
XL 42-44 in 35-38 in 44-47 in 34.0 in
2XL 45-48 in 39-42 in 48-51 in 34.8 in
1X 43-45 in 36-38 in 46-48 in 31.5 in
2X 47-49 in 40-42 in 50-52 in 32.25 in
3X 51-53 in 44-46 in 54-56 in 33 in

Short-Sleeved Shirts

Chest Waist Hips
XS 31-32 in 24-25 in 33-35 in
S 33-35 in 26-28 in 36-37 in
M 36-38 in 29-31 in 38-40 in
L 39-41 in 32-34 in 41-43 in
XL 42-44 in 35-38 in 44-47 in
2XL 45-48 in 39-42 in 48-51 in
1X 43-45 in 36-38 in 46-48 in
2X 47-49 in 40-42 in 50-52 in
3X 51-53 in 44-46 in 54-56 in

Pants

Waist Hips Inseam (Short) Inseam (Reg.) Inseam (Long)
XS (0) 25-26 in 34-35 in 28.5 in 30.5 in 32.5 in
XS (2) 26-27 in 26-28 in 35-36 in 30.5 in 32.5 in
S (4) 27-28 in 36-37 in 29.0 in 31.0 in 33.0 in
S (6) 28-29 in 37-38 in 29.0 in 31.0 in 33.0 in
M (8) 29-30 in 38-39 in 29.0 in 31.0 in 33.0 in
M (10) 30-31 in 39-40 in 29.0 in 31.0 in 33.0 in
L (12) 31-33 in 36-38 in 29.0 in 31.0 in 33.0 in
L (14) 33-35 in 42-44 in 29.5 in 31.5 in 33.5 in
XL (16) 35-37 in 44-46 in 29.5 in 31.5 in 33.5 in
XL (18) 37-39 in 46-48 in 29.5 in 31.5 in 33.5 in
1X (14) 36-37 in 46-47 in 28 in 30 in 32 in
1X (16) 37-38 in 47-48 in 28 in 30 in 32 in
2X (18) 40-41 in 50-51 in 28 in 30 in 32 in
2X (20) 41-42 in 51-52 in 28 in 30 in 32 in
3X (22) 44-45 in 54-55 in 28 in 30 in 32 in
3X (24) 45-46 in 55-56 in 28 in 30 in 32 in

Shorts

Waist Hips
XS (0) 25-26 in 34-35 in
XS (2) 26-27 in 26-28 in
S (4) 27-28 in 36-37 in
S (6) 28-29 in 37-38 in
M (8) 29-30 in 38-39 in
M (10) 30-31 in 39-40 in
L (12) 31-33 in 36-38 in
L (14) 33-35 in 42-44 in
XL (16) 35-37 in 44-46 in
XL (18) 37-39 in 46-48 in
1X (14) 36-37 in 46-47 in
1X (16) 37-38 in 47-48 in
2X (18) 40-41 in 50-51 in
2X (20) 41-42 in 51-52 in
3X (22) 44-45 in 54-55 in
3X (24) 45-46 in 55-56 in

Dresses

Chest Waist Hips
XS 31-32 in 24-25 in 33-35 in
S 33-35 in 26-28 in 36-37 in
M 36-38 in 29-31 in 38-40 in
L 39-41 in 32-34 in 41-43 in
XL 42-44 in 35-38 in 44-47 in
2XL 45-48 in 39-42 in 48-51 in
1X 43-45 in 36-38 in 46-48 in
2X 47-49 in 40-42 in 50-52 in
3X 51-53 in 44-46 in 54-56 in

Unisex Jackets & Tops

Chest Hips Arm Length
S
 36-38 in 35-37 in 33.5 in
M
 39-41 in 38-40 in 34.0 in
L
 42-44 in 41-43 in 34.8 in
XL
 45-48 in 44-46 in 35.5 in
2XL
 49-52 in 47-49 in 36.3 in
3XL
 53-56 in 50-52 in 37.0 in

Unisex Short-Sleeved Shirts

Chest Hips
S
 36-38 in 35-37 in
M
 39-41 in 38-40 in
L
 42-44 in 41-43 in
XL
 45-48 in 44-46 in
2XL
 49-52 in 47-49 in
3XL
 53-56 in 50-52 in

Bras

30 32 34 36 38 40 42
A XS XS S M L XL XXL
B XS XS S M L XL XXL
C XS XS S M L XL XXL
D S M L XL XL XXL

Shoes

US UK EU CM
5 3 36 22
5.5 3.5 36.5 22.5
6 4 37 23
6.5 4.5 37.5 23.5
7 5 38 24
7.5 5.5 38.5 24.5
8 6 39 25
8.5 6.5 39.5 25.5
9 7 40 26
9.5 7.5 40.5 26.5
10 8 41 27
10.5 8.5 41.5 28
11 9 42 28.8

Gloves

Circumference Length
XS 5.5-6 in 5-5.5 in
S 6.5-7 in 5.5-6.5 in
M 7.5-8 in 7-7.5 in
XL 8+ in 7.5-8 in

Hats

Head Circumference
ONE SIZE 21-23.5 in
S/M 21-22.5 in
L/XL 22.5-23.5 in

Kids' Size Guide

Apparel

Height Weight Chest Waist Hip Arm Length Inseam
XS (6) 46-47 in 44-50 lbs 23.5-24.5 in 22-23 in 24.5-25.5 in 23 in 20-21 in
S (7/8) 49-51 in 51-65 lbs 25-27 in 24-25 in 26-28 in 25.5 in 22-24 in
M (10) 52.5-55.5 in 66-87 lbs 27.5-29 in 25-26 in 29-30 in 27 in 25-26 in
L (12) 57.5-59.5 in 88-105 lbs 29.5-30.5 in 26.5-27.5 in 30.5-32 in 28.5 in 27-28 in
XL (14-16) 61-63 in 106-125 lbs 31.5-33.5 in 28-30 in 32-35 in 31.5 in 29-30.5 in
XXL (18-20) 66-68 in 126-140 lbs 34.5-36.5 in 31-33 in 35.5-38 in 33.5 in 30.5-31.5 in

Shoes

Toddlers Little Kids Big Kids
4 | 3.5 in 10 | 5.9 in 1 | 7.5 in
5 | 3.9 in 11 | 6.3 in 2 | 7.9 in
6 | 4.3 in 12 | 6.7 in 3 | 8.3 in
7 | 4.7 in 13 | 7.1 in 4 | 8.7 in
8 | 5.1 in 5 | 9.1 in
9 | 5.5 in 6 | 9.4 in
7 | 9.8 in

Gloves

Hand Circumference Length
XS 5 in 5 in
S 5.5 in 5.5
M 6 in 6 in
L 6.5 in 6.5 in
XL 7 in 7 in

Hats

Head Circumference
S (2T-4T)
 19.5-20.5 in
M (5-10)
 20.5-21.5 in
L (10+)
 21.5-22.5 in
One Size
 20.5-22.5 in

  • Recycled material

    Recycled content – Helps reduce landfill waste and the use of virgin materials.

  • Down fill

    Lofty down insulation maintains warmth in cold conditions.

  • Style NF0A8CNH1U5

    Our warmest expedition bag, the Inferno -40F/-40C is designed with ultra-warm 800-fill ProDown™ and recycled exterior fabric that offers top-level performance in extreme cold. The main body is engineered for higher thermal retention, while the side baffles help reduce cold spots and retain loft.

  • Sizes

    RRH, LRH

  • Total Weight

    reg - 3 lbs 9 oz (1620 g) / long - 3 lbs 11 oz (1667 g)

  • Temp Rating

    -40°F / -40°C

  • Stuffed Size

    12'' x 12'' x 16'' (30.5 cm x 30.5 cm x 40.6 cm)

  • Internal Length

    reg - 78'' (198 cm) / long - 84'' (213 cm)

  • Max User Height

    reg - 6' (183 cm) / long - 6'6'' (198 cm)

  • main body

    15D recycled nylon coated with aluminized XReflex treatment

  • head and footbox

    15D recycled nylon ripstop with breathable coating

  • lining

    30D nylon taffeta

  • insulation

    800 fill ProDown™; Responsible Down Standard (RDS) certified by Control Union, CU 843098
  • Main body—made with recycled nylon—is light, durable and coated in aluminized XReflex for higher thermal retention
  • Full draft collar and integrated draft overlap for added comfort and to help prevent heat loss
  • Side half zipper so the sleeper can make adjustments to help regulate temperature
  • Trapezoidal side-chamber baffles reduce cold spots and retain loft
  • Shockcords on the back of the bag attach to a sleeping pad so the pad will stay in place while you sleep
  • Hood cinch-cord helps seal out the cold
  • Fitted hood for more warmth and comfort
  • Anti-compression pads for better clo values
  • Vaulted footbox
  • Waterproof and breathable NeoVent Air fabric helps protect the hood and footbox
  • Compression sack and storage sack included

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