How long does delivery take?

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.

Who do you use for delivery?

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.

Can I track my delivery?

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.

What does 'Special Order' mean?

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.

Can I return an item?

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. Return postage is at your own cost.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.

Mountain Equipment Helium 800 Down Sleeping Bag - Hill and Dale Outdoors

ME-006062

Mountain Equipment Helium 800 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

£318.98 - £334.98 £400.00 - £420.00

Ideal for cold-weather backpacking and trekking, this lightweight yet warm sleeping bag excels in unheated Himalayan tea-houses or alpine winter shelters, making it the perfect companion for challenging conditions.

Ideal for: Backpacking & Trekking
Weight: 1230g/2 lbs 11.4ozs
Good Night's Sleep Temperature: -16°C/3°F

The Helium 800 combines 795g of minimum 700-fill power DOWN CODEX-certified duck down with a high-performance, fully recycled Helium 20D outer fabric. This results in a warm, lightweight, and highly compressible sleeping bag that packs down easily. Designed for versatility and durability, it features expedition-tested details, making it ideal for high-altitude backpacking or winter ski touring.

The slant-baffle design throughout the body enhances insulation, boosts compressibility, and stops down from shifting, ensuring consistent warmth and eliminating cold spots. A four-baffle configuration at the foot concentrates heat where it’s most needed during prolonged exposure to cold, while the hood’s five-baffle system maximizes comfort by securely holding the down in place.

Inside the bag, a 100% recycled Supersoft 20D lining fabric with PFAS-free DWR offers breathability and durability for comfortable nights and a long lifespan, while a full-length Gemini™ entry zip baffle practically eliminates heat loss in this vulnerable area and is stiffened so it won’t catch in the zip. The low-profile magnetic Lode Lock™ closure and collar drawcords are practical and easy to use 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 -16°C (3°F), the Helium 800 is a reliably warm and packable bag, perfect for camping, trekking and touring in cold conditions.

Mountain Equipment Helium 800 Specs:

User Size:

Regular: 185cm (6 ft 1 in) maximum user height
Long: 200cm (6 ft 6 in) maximum user height

Weight:

Regular: 1230g (2lb 11.4oz)
Long: 1290g (2lb 13.5oz)

Insulation:

Regular: 795g of 90/10 Duck Down with 700+ fill power.
Long: 840g of 90/10 Duck Down with 700+ fill power.

Temperature Ratings (EN13537/ISO23537):

Comfort: -8°C (18°F)
Comfort Limit: -15°C (5°F)
Extreme: -36°C (-33°F)
Good Night's Sleep Temperature: -16°C (3°F)

Packed Size:

31cm x 24cm x 24cm (12.2in x 9.4in x 9.4in)

Manufactured in: Vietnam

Mountain Equipment Helium 800 Features:

Insulation:

Optimised baffle-by-baffle for maximum warmth-to-weight ratio.
Regular: 795g of 90/10 Duck Down with 700+ fill power.
Long: 840g of 90/10 Duck Down with 700+ 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

: 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.
: 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. Return postage is at your own cost.
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.

More...

Free UK Delivery (over £100)

Express Delivery £5.98

30 Day Returns

Country