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Sleeping Bag trekking - TREK 500 0° Light - Brown

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Regular price Regular price: $149.00 Sale price Regular price:

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A photo of the Sleeping Bag trekking - TREK 500 0° Light - Brown in use

Sleeping Bag trekking - TREK 500 0° Light - Brown
Our designers, who are all trekking enthusiasts, designed this sleeping bag to sleep comfortably when bivouacking at temperatures above or equal to 0°C.

This very compact and lightweight bag has a wide temperature range. Sleep comfortably from 0° to 10°C thanks to the two 3/4 zips with two-way cursors to manage thermal comfort: Tailored ventilation.

Optimum temperature

Comfort temperature: 0°C; limit temperature: -5°C. Synthetic wadding.

Easy transport

In size L: weight 1.67kg. Volume 15.2 litres. Compression cover.

Sleeping quality

Very comfortable mummy shape. 2 3/4 zips with two-way cursor to ventilate.


Can be twinned with other models from the "Ultralight" 2017 &"light" 2018 range.

Water repellent

Water-repellent fabric to optimise the thermal performance of your sleeping bag.


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Product Reviews

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8 Reviews
Write review Sleeping Bag trekking - TREK 500 0° Light - Brown
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very good

0 to -5 cold weather comfort product

Gud To Sleep

It seems to be a home

Snow trek

Comfortably slept and was warm enough at -5 degrees at Dayara Bugyal


Thank you



Thank you for your valuable review. We appreciate you taking out time to review our products.


Product Trainer and Passionate Backpacker

Sleeping bag

This particular edition of the Forclaz sleeping bag is superbly compatible with sub-zero temperatures.

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Nice Products

Product is overall good but, needs improvement in stiching

cold during Scottish summer

Usually a big decathlon fan but extremely disappointed with this sleeping bag. I was cold on a 9 degrees night and the material feels very cheap and uncomfortable to sleep in. Will be returning this item. My friend bought a 20 pound bag from Amazon, and I am sad to say it was better quality than mine.


Hi, thanks for taking the time to review our Forclaz Trekking Sleeping Bag 0c.

I'm sorry to hear that you had a bad experience with this product, the nights in Scotland can definitely be chilly, even in Mid-summer!

However the bag should be able to keep you warm in such conditions, to be honest I'm a little surprised, because I have a 0 degree rated Forclaz bag, although the Trek 900 Down version and in similar conditions find it too warm if anything!

I have a couple of suggestions to help keep you warm, such as using an appropriate insulating sleeping mat such as our Trek 100 Forclaz Foam Mattress. If there is a lot of space inside the bag this can also prevent the insulation from working properly, you can fill any excess space with spare clothes which should help. Wearing a thin hat, some warm socks and maybe a thin thermal base layer could also help. Also using a sleeping bag liner can improve slightly the thermal properties of the bag and also help keep it clean.

That being said, if you are unhappy with the bag I would invite you to pop in to your closest store, where I'm sure they could find a solution for you.

I'm sorry again to hear about your bad experience, I hope you managed to enjoy the rest of your trip!


Peter - Forclaz Product Expert, Decathlon UK


Bag is good for summer hiking in Himalayas

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Product information



  • 100% Polyester

Main fabric

  • 100% Polyester

Carry bag

  • 100% Polyester


  • 100% Polyester

Use temperature:

All our sleeping bags display the temperature ratings, tested by an independent laboratory (AITEX), in accordance with the European NF ISO 23537 standard (2017).The comfort temperature is the lower limit at which the user, in a relaxed pose, is in overall thermal equilibrium and feels neither too cold nor too hot (for a standard woman in normal conditions of use). Choose your sleeping bag according to this measure.

What are the temperatures ratings?

Limit temperature: temperature at which the user huddled up in the sleeping bag is generally in thermal equilibrium and feels neither too cold nor too hot (defined for a standard man and in normal conditions of use).We recommend you use an insulating mattress to optimise your thermal comfort.This sleeping bag is filled with synthetic wadding to guarantee performance even in damp conditions.

What you need to know about temperatures:

A sleeping bag does not produce heat but retains the heat produced by the body. If you are tired and cold and you slip inside a cold, damp sleeping bag, it is very likely that you will feel cold no matter how good your sleeping bag is! These temperatures therefore depend on the person's resistance to cold (bulk, fatigue, etc.), equipment (mattress with insulation, etc.), clothing (naked, underwear, etc.) and weather conditions (humidity, wind, etc.).

For greater comfort, before getting into your sleeping bag:

Dress simply (1 layer of clothing is enough).Keep your head, hands and feet warm: use hats, gloves, socks, bed warmers, rubbing, etc.A flask filled with hot water can be used as a hot water bottle (if it can't open by accident !)Contract your muscles (70% of the energy consumed is transformed into heat). However you should do this without moving as this can cause draughts of cold air.Use a sleeping bag liner to maximise the heat inside your sleeping bag.


"Generous" mummy shape: wide at the shoulders and tighter around the feet to optimise thermal insulation (no loss of heat) and remain compact, while keeping relative freedom of movement.Width at the shoulders 72 cm, height at the feet 34 cm in size L.Ergonomic hood with drawcord.Two double-slider side zips, lined with a flap (tube) in anti-cold wadding (thermal bridges), side openings. Easy mechanical ventilation.

Weight and size:

Size S 1450g, users up to 1.60m. Folded dimensions: L 42 cm Ø 19.5 cm. Volume 12.5 litres.Size M 1550g, users between 1m60 and 1m70. Folded dimensions: L 42 cm Ø 20.5 cm. Volume 13.9 litres.Size L 1670 g, user between 1.70m and 1.85m. Folded dimensions: L 42 cm Ø 21.5 cm. Volume 15.2 litres.Size XL 1785 g; user height 1.85 m to 2 m. Folded dimensions: L 42 cm Ø 22.5 cm. Volume 16.7 L.Volume and dimensions can vary according to the pressure applied to the product.

Weight and size (2)

Volume and dimensions can vary according to the pressure applied to the product.For your comfort, try out your bag before buying it to make sure you have the right size. The advantage of a mummy-type sleeping bag is that the weight/volume ratio and thermal comfort are optimised. With a fitted bag, there is less volume to heat (saves your energy). However, this type of sleeping bag can limit your freedom of movement, especially when the zips are closed.


This sleeping bag is guaranteed for 5 years from the date shown on the sales receipt. The product covered by the warranty will be repaired or exchanged free of charge. The warranty covers product defects, excluding those resulting from normal wear and tear and improper use. This special 5-year warranty is only valid on presentation of the product and receipt.


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