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Backpacking Sleeping Bag Light 41° Trek500

Sale price: $40.00 Regular price: $59.99
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Sale price: $40.00 Regular price: $59.99

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Model: 8503639

Product Features

A photo of the Backpacking Sleeping Bag Light 41° Trek500 in use

Backpacking Sleeping Bag Light 41° Trek500 is designed for sleep comfortably in temperatures above or equal to 41°F when backpacking or bivouacking.

Bag that can be twinned with the 2017 "ultralight" and 2018 "light" series. Wide temp. range: 41 to 59°F for extra comfort thanks to the 2 x 3/4 zippers with double sliders for temperature management.

Optimal temperature

Normal temperature rating 41°F / Limit temperature rating 32°F

Easy to transport

2.6 lbs in size L. Volume 11 liters. Stuff bag.

Sleeping comfort

Very comfortable mummy shape. 2 x 3/4 zippers with 2-way slide to ventilate.


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

Water repellent

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

Product Lifestyle Image Gallery

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Backpacking Sleeping Bag Light 41° Trek500,brown 

Backpacking Sleeping Bag Light 41° Trek500,brown 

Backpacking Sleeping Bag Light 41° Trek500,brown 

Backpacking Sleeping Bag Light 41° Trek500,brown 

Backpacking Sleeping Bag Light 41° Trek500,brown

Product Customer Reviews

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Backpacking Sleeping Bag Light 41° Trek500,brown
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Great !

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Sleeping bag

The sleeping bag was excellent, my son used it on his activity holiday, easy to pack and unpack. Kept him warm during the night, easy to use, definitely recommend to this product...

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Did the job we were looking for

Bought for the ability to zip two bags together. Took them on a camping trip to Brittany in early June and had no real issues with it. Only comment would be I was nice and hot/cosy and my wife said she was sometimes a bit cold.

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Excellent bag very comfortable

I used this bag overnight in the foothills of our local mountains. It was a warm evening but clear skys soon lead to a drop in temperature from 18c down to just above freezing with the wind chill. In fact at sea level there was a frost at dawn. I slept in a single pair of trousers and a top and had the hood up and zips closed. I was comfortably warm all night, only waking as my companion had ventured outside to use the toilet and was suffering from the cold on coming back in and unable to warm again. I was delighted with the performance of the bag. I had camped out a few weeks prior in my old bag and woke before dawn shivering, I'm glad to say this bag exceeded my expectations and the old bag will be relegated to summer use. The bag packs down OK, it's a little bulky in the rucksack but I knew that before buying it. I bought the xl bag as I am 185cm 6'2" and well built so I wanted a bit of room. Recommended at this price

Sleeping bag

Used this on DofE. One night fine. Second night a bit chilly, but better than my previous bag.

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Warm + Fast Delivery!

3 days after purchase 2 of these bags they arrived at my home. Super stoked with the quality of the product and after searching far and wide I cant find any other compact tent that matches the price and quality of Trek 500 5degree Sleeping Bag - Light Yellow!

Toasty warm

The sleeping bag kept me toasty warm at the 2018 OMM in the Black Mountains, were the temperature s went below zero over night. The bag is also relatively light and small whilst being warm.

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Muy cómodo y caliente

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Saco forclaz 5°

Buen saco de dormir para dormir en refugio, mejor complementado con la funda interior.

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Muchisimo frio con temperaturas entorno a 5 grados

Hola, Revisando el resto de opiniones, comparto plenamente la opinion de aquellas que lo han utilizado en 5 grados y estan muy decepcionados por el gran frio que pasaron. Este saco no es suficiente para las temperaturas que anuncian. Aquellos que deseen comprarlo les recomendaria que mirasen otras marcas. Hay otras opiniones positivas que dicen que para ellos estuvo bien, pero en mi caso y os aseguro que las temperaturas eran de 5 grados y pase muchisimo frio. Tuve que dormir con tres capas de ropa en la parte superior y una malla termica en las piernas y logicamente con calcetines. El saco de dormir es una pieza clave para el camping asi que recomendaria a los usuarios que busquen mas y comparen como esta construido este saco comparado con otras marcas.

Pasé mucho frío a 6ºC

Me lo llevé a un ruta de treking de 5 días en Noruega la semana pasada. Pasé muchísimo frío, llegué a tiritar dentro del saco de dormir, estuve constantemente revisando la temperatura exterior y estaba entorno a los 9ºC-6ºC. Utilicé una esterilla inflable con aislamiento y por suerte no me traspasaba el frío del suelo, sin embargo el tejido en contacto con el aire estaba muy frío y dejaba pasar el frío de mi entorno. Pasé una noche terrible, por miedo a llagar a la hipotermia sí hubiera seguido bajando a menos de 6ºC, pese a llevar puesta casi toda la ropa del viaje entero en esa noche para paliar los efectos del frío. En las demás noches de la ruta si la temperatura exterior rondaba los 10ºC o más no tenía sensación de frío, pero me quedé muy decepcionada porque sabía que iba a un sitio frío e iba muy preparada y por esa misma razón compré un saco para 5ºC... si lo hubiera sabido me hubiera comprado el de 0ºC, que no me parece muy lógico... Ya que tengo otro saco para temperaturas de 0ºC a -10ºC para la nieve al igual que otro saco de la gama Ultralight de 15ºC y la temperatura de comfort ha sido correcta en todos ellos.

Algo escaso...

Lo hemos comprado para el campamento de la niña y regresó quejándose de que había pasado algo de frío. Comprobando las mínimas nocturnas de la zona, tuvieron un día de 12 grados, pero la mayoría no bajaron mucho de los 15. No me lo esperaba para un saco que se anuncia como 5°.

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Muy buen producto suave

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Additional Product Information



  • 100% Polyester cationic


  • 100% Polyester cationic

Outer fabric

  • 100% Polyester cationic

Carry bag

  • 100% Polyester cationic

Temperature rating:

On all of our sleeping bags, we display the comfort temperatures tested by an independent laboratory (AITEX) according to European standard NF ISO 23537 - 2017. The temperature rating is the lower limit at which the user is generally in thermal equilibrium and feels neither too cold nor too hot in a relaxed pose (for a standard woman and in normal conditions of use). Choose your sleeping bag according to the latter.

What are the limit temperature of use?

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 under normal conditions of use).

However, this is what you need to know about the temperature ratings:

A sleeping bag does not generate warmth but retains the warmth produced by the body. If you feel tired and cold and slip into a cold and damp sleeping bag, you are likely to feel cold, however good it is! These temperatures therefore depend on the person's resistance to the cold (bulk, fatigue, etc.), their equipment (mattress that insulates from the cold, etc.), their clothing (naked, underwear, etc.) and the weather conditions (humidity, wind, etc.).

For more comfort when you slip into your sleeping bag:

Dress simply (just 1 layer of clothing is enough). Keep your head, hands and feet warm: hats, gloves, socks, hand or feet warmers, rubdown, etc. A bottle full of hot water can be used as a hot water bottle (as long as it will not open accidentally!) Contract your muscles (70% of the energy consumed is transformed into heat). However you should do this without moving as this can cause drafts of cold air. Use a liner sheet, ideally made of silk, to optimize the warmth inside your sleeping bag.


"Generous" mummy shape: wide at the shoulders and more narrow at the feet to optimize thermal insulation (no heat loss) and compact size, while retaining some freedom of movement. Width at shoulder height 30.1" and at feet height 12.6" in size L. Ergonomic hood with drawstring. 2 side zippers with double sliders, lined with a flap (sausage-shaped) made of insulating wadding (thermal bridges) and side openings.

Weight and size:

Size M 2.4 lbs, user up to 5'7" in height. Folded dimensions: Ø 15" x 6.7". Volume 10 L. Size L 2.6 lbs, user between 5'7" and 6'1". Folded dimensions: Ø 15" x 7.3". Volume 11 L. Size L 2.8 lbs, user between 5'7" and 6'1". Folded dimensions: Ø 15.7" x 7.7". Volume 12.5 L. Try out your sleeping bag before buying it in order to get the right size for your comfort.


This sleeping bag is guaranteed for a period of 5 years from the date of sale indicated on the receipt. The product covered by the warranty will be repaired or exchanged free of charge. The warranty covers the defects of your sleeping bag apart from those resulting from normal wear and tear and improper use. This special 5-year warranty will only be granted upon presentation of the product and sales receipt.



Storage instructions

Easily store your bag by stuffing it in its bag, feet end first. To maintain its fill power, which is what provides the thermal insulation, remove the bag and store it flat in a dry place.

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Size Guide Visual