Sleeping bag liner & travel sheet

2 products

Le sac à viande, ou drap de sac, complète efficacement un sac de couchage : il protège le garnissage de la transpiration, facilite l'entretien et peut s'utiliser seul lors d'un séjour en refuge. Soie, coton ou synthétique, chaque matière répond à un usage précis, du trek léger au camping estival.

Sleeping bag liner +8°C | Aegismax

Sleeping bag liner +8°C | Aegismax

49.00 €
Sleeping bag liner +5°C | Aegismax

Sleeping bag liner +5°C | Aegismax

49.00 €

A sleeping bag liner, also known as a travel sheet, is a thin textile envelope that slides inside a sleeping bag or is used on its own during nights in mountain huts or hostels. Its primary role is hygienic: it protects the sleeping bag's filling from perspiration and direct soiling, which limits the frequency of washing and preserves its insulating properties over time.

Different materials and their uses

The choice of material depends on the intended use and the season:

  • Silk: the lightest and most compact of the three options, it slides easily inside a sleeping bag and provides a slight thermal gain. Its maintenance requires more care than synthetic fabric
  • Cotton: pleasant to the touch and breathable, it is well-suited for summer nights or stays in mountain huts where weight is less of a concern. It dries more slowly than silk or synthetic fabrics
  • Synthetic (polyester, microfiber): robust, quick-drying, and easy to maintain, with a weight between that of silk and cotton. A practical compromise for regular use

Why use a sleeping bag liner with a down sleeping bag?

For a natural down-filled sleeping bag, a liner plays a particularly useful role: it reduces direct contact between the skin and the inside fabric of the bag, limiting the accumulation of moisture and sebum that can alter the loft of the down over the long term. Spacing out full washes of the sleeping bag thus preserves its thermal performance from one season to the next.

In mountain huts, some establishments require the use of a sleeping bag liner for collective hygiene reasons, regardless of whether you have your own sleeping bag. A lightweight, machine-washable model is recommended in these cases.

Thermal gain: what you need to know

A sleeping bag liner can provide an additional thermal gain, generally estimated between 2°C and 5°C depending on the material and thickness. This value is indicative and varies significantly depending on usage conditions; it should not be considered certified data equivalent to a comfort temperature measured according to the EN 13537 standard. The liner remains a supplementary item, not a substitute for a sleeping bag suited to the actual temperature of the trip.

Frequently asked questions

What is the difference between a sleeping bag liner and a travel sheet?
None: both terms refer to the same product, a thin textile liner that slips inside a sleeping bag or can be used on its own in a mountain hut. The term "sac à viande" (meat sack) comes from hiker and mountaineer jargon, while "drap de sac" (sleeping bag liner) is the more general term used in camping and travel. Both serve the same purpose: hygienic protection and light additional warmth.

Which material should I choose between silk, cotton, and synthetic?
The choice depends on its use. Silk is the lightest and most compact, ideal for trekking where every gram counts, but requires more careful maintenance. Cotton is breathable and comfortable for summer nights or stays in mountain huts, at the cost of longer drying times. Synthetic offers the best compromise between maintenance and durability for regular use, with a weight between the other two materials.

Is a sleeping bag liner mandatory in mountain huts?
It depends on the establishment. Some mountain huts require the use of a sleeping bag liner for collective hygiene reasons, regardless of each person's personal sleeping bag. It is recommended to check with the hut before your trip. A lightweight, machine-washable model is well-suited for this occasional use.

Does a sleeping bag liner really protect the down in a sleeping bag?
Yes, to a certain extent. The sleeping bag liner reduces direct contact between the skin and the inner fabric of the sleeping bag, which limits the buildup of sweat and skin oils that can impair the loft of the down filling over time. It therefore allows for less frequent full washings of the sleeping bag, a useful practice since natural down requires more careful maintenance than synthetic material.

How many extra degrees can a sleeping bag liner add?
Thermal gain is generally estimated between 2°C and 5°C depending on the material and thickness, but this value remains indicative and varies according to conditions of use. It does not constitute certified data equivalent to a comfort temperature measured according to the EN 13537 standard. The sleeping bag liner remains a supplementary item, never a substitute for a sleeping bag adapted to the actual temperature of the trip.