Mammut Comfort Fiber Bag -15C L Sleeping Bag

The Mammut Comfort Fiber Bag is listed as a size L mummy sleeping bag with a -15°C temperature rating. Its listed weight is 730 Grams, and the product information describes a central two-way zip for climate regulation.

At a glance

The listing gives a -15°C temperature rating and describes the bag as tested to EN ISO 23537-1:2016.
A central two-way zip is described as allowing climate regulation.
An insulated strip along the zip is claimed to help limit cold bridges.
The product information describes an updated YKK zip intended to prevent fabric jamming.

Price

£166.30Save 15%

Reference price: ~~£195.71~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

The central two-way zip can be opened from different points to adjust ventilation, according to the listing.
The insulated zip covering is a concrete design feature aimed at reducing cold spots along the closure.

Technical specifications

17 specifications

Identity
Brand	Mammut
Model	QUXING

Dimensions and installation
Form factor	Mummy
Weight listed	730 Grams
Size	L
Maximum recommended height	6 Feet

Materials and protection
Material listed	Polyester
Outer material	Nylon/Polyester
Colour	deep cypress

Temperature and use
Temperature rating	-15°C
Season listing	Spring/Summer
Intended sport	Hiking
Occupancy	2 Person
Thermal resistance	15 R-value
Age range	Adult

Construction and features
Closure	Zipper
Special features	Easy Installation, Wind Noise Reduction

What to know before buying

Listing details to confirm

The listing combines a -15°C rating with a Spring/Summer season label and also gives conflicting use descriptors: Mummy shape and size L are listed alongside 2 Person occupancy, Easy Installation and Wind Noise Reduction. Confirm the intended configuration and rating interpretation before buying. These listing details are inconsistent, not proof of a product defect.

Who is it for?

A good fit for

Hikers seeking a listed mummy sleeping bag with a central two-way zip and a claimed -15°C rating.
Buyers who want polyester fill and an insulated zip covering, subject to confirming that the listed configuration suits their needs.

Less suited to

Anyone needing confirmed two-person dimensions or a clear seasonal comfort rating, since the listing does not resolve these details consistently.

Mammut Comfort Fiber Bag -15C L Sleeping Bag · photo 2 — Additional product photo 2

Customer reviews on Amazon

3.7 / 5 · 7 ratings

5 stars37%37%
4 stars17%17%
3 stars29%29%
2 stars17%17%
1 star0%0%

Aggregate customer ratings are mixed, with responses spread across five-, four-, three- and two-star categories. The small rating sample does not establish why customers responded as they did or how the bag performs against its listed temperature rating.

Frequently asked questions

What temperature rating is listed?

The listing gives a temperature rating of -15°C and says the bag was tested according to EN ISO 23537-1:2016. It does not explain whether this is a comfort or limit rating.

What size is this model?

The title specifies size L. The listing also gives a maximum height recommendation of 6 Feet.

Is it a one-person or two-person bag?

The listing says 2 Person but also describes a Mummy shape. It does not provide dimensions to clarify the occupancy, so confirm the intended configuration before ordering.