Mountain Equipment Helium 250 Women's Down Sleeping Bag - Hill and Dale Outdoors

ME-006074_ME-01596_LZR

Mountain Equipment Helium 250 Women's Down Sleeping Bag

Size chart
Mountain Equipment Size Guide

Using size charts

The charts below give measurements of your body that the garments of each size are designed to fit. The sizing of the garments makes allowance for whether they are close fitting or not and what they are designed to be worn with.

This guide has been taken directly from the Mountain Equipment website and should be used as a guide only.  We will not accept liability for any garments purchased according to this size guide that do not fit the way you want.

 

Measuring your body [for clothing]

Take measurements wearing only baselayers/light clothing. The tape should be tight but not restrictive.
1) With a tape measure, measure your chest at the fullest part, keeping the tape horizontal.
2) Measure your waist at the narrowest point above the pelvis keeping the tape horizontal.
3) (For women) With your feet shoulder width apart, measure your hips at the fullest point while keeping the tape horizontal.

 

Men's Clothing

UK XXS XS S M L XL XXL XXXL

EU

44

46

48

50

52

54

56

58+

US

XXS

XS

S

M

L

XL

XXL

XXXL

Chest Size

Inches

cm

31-34

80-86

34-36

86-92

36-39

92-98

39-41

98-104

41-43

104-110

43-46

110-116

46-48

116-122

48-50

122-128

Waist

Inches

cm

26

64-69

28

69-74

30

74-79

32

79-84

34

84-89

36

89-94

38

94-99

40

99-104

 

 

 

Women's Clothing

UK 8 10 12 14 16 18

EU

34-36

36-38

38-40

40-42

42-44

44-46

US

XS (4)

S(6)

M(8)

L(10)

XL(12)

XXL(14)

Chest Size

Inches

cm

32-34

82-87

34-36

87-92

36-38

92-97

38-40

97-102

40-42

102-107

42-44

107-112

Waist

Inches

cm

25-27

64-69

27-29

69-74

29-31

74-79

31-33

79-84

33-35

84-89

35-37

89-94

Hips

Inches

cm

35-37

88-93

37-39

93-98

39-41

98-103

41-43

103-108

43-45

108-113

45-47

113-118

 

 

Measuring your hand [for gloves]

With your palm face up, measure the circumference of your hand at the widest point, excluding your thumb and with your fingers in a relaxed position. The tape should be tight but not restrictive.

Gloves

XS S M L XL XXL

Women

6-7in

7-7.25in

7.25-7.75

7.75-8in

Men

7-7.5in

7.75-8.25in

8.25-8.75in

8.75-9.25in

9.25in-10in

10-10.75in

Sleeping Bag Size: Left Zip Regular

2 items left

Weighing less than most bottles of water and packing down equally small, this is the perfect bag for the dedicated warm-weather backpacker looking to lighten their load.

  • Ideal for: Backpacking & Trekking
  • Weight: 600g/1 lbs 5.2ozs
  • Good Night's Sleep Temperature: 3°C/37°F

Crafted with 261g of 700-fill power DOWN CODEX-approved duck down and a 100% recycled Helium 20D outer fabric, the Helium 250 is a highly efficient, lightweight, and packable sleeping bag. It is an ideal choice for backpackers and tourers seeking to reduce their pack size, especially in warm weather conditions.

Utilizing slant-baffle construction throughout the body enhances warmth, increases packability, and prevents down migration, ensuring you stay warm throughout the night without any cold spots. Along the foot of the bag, a four-baffle system directs warmth towards your feet, while the hood features a five-baffle system for maximum comfort and precise distribution of down.

The bag features a 100% recycled Supersoft 20D lining fabric with PFAS-free DWR for breathability and durability, along with a full-length Gemini™ entry zip baffle to reduce heat loss in the vulnerable area. The magnetic Lode Lock™ closure and collar drawcords are convenient and user-friendly even in the dark.

Designed with a technical yet comfortable Alpine 2.0 fit, Helium bags optimise thermal performance while minimising weight. With a Good Night’s Sleep Temperature of 1°C (34°F), the Helium 250 is the best choice for warm-weather camping and backpacking.

 

Mountain Equipment Helium 250 Specification:

User Size:

  • Regular: 170cm (5 ft 6 in) maximum user height
  • Long: 185cm (6 ft 1 in) maximum user height

Weight:

  • Regular: 600g (1lb 5.2oz)
  • Long: 620g (1lb 5.9oz)

Insulation:

  • Duck Down is ethically sourced via DOWN CODEX© and RDS 3.0.
  • Regular: 242g of 90/10 Duck Down with 700+ fill power.
  • Long: 256g of 90/10 Duck Down with 700+ fill power.

Temperature Ratings (EN13537/ISO23537):

  • Comfort: 7°C (45°F)
  • Comfort Limit: 2°C (36°F)
  • Extreme: -12°C (10°F)

Good Night's Sleep Temperature:

  • 3°C (34°F)

Packed Size:

  • 19cm x 17cm x 15cm (7.5in x 6.7in x 5.9in)

Manufactured in:

  • Vietnam


Mountain Equipment Helium 250 Features:

Insulation:

  • Optimised baffle-by-baffle for maximum warmth-to-weight ratio.
  • Regular: 242g of 90/10 Duck Down with 700+ fill power.
  • Long: 256g of 90/10 Duck Down with 700+ fill power.
  • Ethically sourced through DOWN CODEX© and RDS 3.0.
  • Each bag includes a unique DOWN CODEX© code for transparency on sourcing and fill power.

Materials:

  • Recycled HELIUM™ 20D: A lightweight (38gsm), recycled 20-denier fabric that balances durability, compressibility, and weather resistance. Densely woven for wind and heat loss resistance with a PFAS-free DWR finish.
  • Supersoft™ Lining: 38gsm 20D recycled downproof nylon for breathability, durability, and next-to-skin comfort. PFAS-free DWR finish.

Patterning & Design:

  • Designed for long-term durability and high performance.
  • Women’s Alpine Fit: A refined, tapered shape with a zoned EXL® system that improves thermal efficiency while keeping the weight low.
  • Slanted box-wall baffles: Reduce structural weight while optimising insulation.
  • Strategic fill distribution: High-density fill in key areas (underside, hood, foot box) to prevent down migration and enhance warmth.

Foot box:

  • Trapezium 4 System: A four-baffle design that enhances warmth and prevents compression around the feet.

Hood:

  • Five-baffle construction for precise down control, low weight, and superior insulation.
  • Spacious yet snug with dual tether drawcords to minimise heat loss.

Zip Baffles & Collars:

  • Gemini™ Baffle System: A lightweight, low-profile design that minimises heat loss while maintaining protection.
  • Lode Lock™ System: A secure, magnetic fastener with a mechanical lock for a one-handed quick-release closure.
  • Integrated, adjustable down-filled neck collar for extra warmth.

Additional Features:

  • Waterproof roll-top stuff sack: Maximises pack space and keeps gear dry.
  • Storage Cube: Preserves down loft for better long-term performance. Ideal for at-home storage.

FAQ

Delivery Details

In-stock items are dispatched the same day if ordered before 2pm (Monday - Friday) or the next working day if ordered after 2pm or on a weekend.

Deliveries are normally next working day for orders over £60. If under £60, we sometimes use a 48 hour service. You will have the option to upgrade to a next day service at the checkout.

Special Order items are dispatched within the timescales displayed after selecting your size.

Most orders are dispatched using DPD Next Working Day.

We use Royal Mail 24 for the more remote parts of Scotland, the Channel Islands and Northern Ireland. Please allow a little extra time for delivery in these areas.

For orders under £60, we normally dispatch using Royal Mail 48 with delivery being made in 2 to 3 days. You will have the option to upgrade to a next day service in the checkout.

A tracking number will be emailed to you for all orders over £60 on the day of dispatch.

For orders under £60 dispatched using an untracked economy service, a reference number will be emailed, but you will not get full tracking, only confirmation once delivery has been attempted.

Other Questions

Sometimes you will see 'Special Order' when selecting your size. For these items, we will dispatch once we have received them from our supplier.

An estimated lead time will be displayed for Special Order items.

Yes, returns are accepted within 30 days of purchase so long as it is unused and still in it's original packaging*.

You can return for an exchange or refund.

Refunds are carried out immediately after receiving your item back. Return postage is at your own cost.

* for safety reasons, we do not accept the return of climbing equipment or underwear once it has been tried on.

All items sold come with a minimum 12 month warranty that covers defects in materials or workmanship.

Certain brands offer an additional warranty. You can find this information on the brands own website, or you can contact us for additional information.

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