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Lifeventure

Lifeventure Thermolite Liner-Rectangular sleeping bag

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Features of Lifeventure Thermolite Liner-Rectangular

Product description of Lifeventure Thermolite Liner-Rectangular sleeping bag

Description summary

Thermolite Sleeping Bag Liner.

Description.

Designed to add warmth without bulk, the Thermolite Sleeping Bag Liner is made from a lightweight, durable fabric that is soft and stretchy for a comfortable night´s sleep.

It can increase sleeping bag performance by up to 15°C, making it ideal for cold conditions, shoulder-season camping or extending the range of your existing sleep system.

An integrated drawstring hood helps retain heat around the head, while Polygiene odour control technology keeps the liner fresher for longer.

Suitable for use on its own or inside a sleeping bag, it packs away neatly into a tough ripstop carry case.

Features.

Lightweight, durable fabric.

Soft & stretchy.

Drawstring hood.

Use on its own in warmer climates.

Wicks away perspiration & dries quickly.

Increases warmth by up to 15°C / 25°F.

Polygiene® odour control technology.

Supplied with a tough ripstop carry case.

Technical details.

Weight:

430g.

Dimensions packed:

22 x 12 x 6cm.

Dimensions unpacked (Mummy):

220 x 56-85cm.

Dimensions unpacked (Rectangular):

220 x 85cm.


Specifications

Manual

Technical specifications of Lifeventure Thermolite Liner-Rectangular

  • Total weight

    430g

  • Packed size

    22x12 x 6cm

  • Color

    Orange

  • Gender

    Men

  • Gender

    Women

  • Age

    Adult

  • Insulation

    Insulated synthetic

Features of Lifeventure Thermolite Liner-Rectangular

Color Orange

Color

Orange

Gender Men

Gender

Men

Women

Women

Age Adult

Age

Adult

Insulation Insulated synthetic

Insulation

Insulated synthetic

Key differentiators

Features Polygiene® odour control technology to maintain freshness

Includes an integrated drawstring hood to help retain heat

Increases sleeping bag warmth by up to 15°C with Thermolite® synthetic insulation

Packs into a tough ripstop carry case for easy transport

Soft, stretchy, and quick-drying fabric for enhanced comfort

Technology in Lifeventure Thermolite Liner-Rectangular sleeping bag

Energy rating

Warnings

/ 5

1 Reviews

What our customers are saying about Lifeventure Thermolite Liner-Rectangular sleeping bag

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Answer the question

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The question has already been answered, thank you very much for trying to help another customer. We will count on you for future questions.

Include AI Generated questions and answers

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

What is the main purpose of the Lifeventure Thermolite Sleeping Bag Liner?

Answer of Generated by AI and verified

The Lifeventure Thermolite Sleeping Bag Liner is designed to add warmth to your sleeping system without significant bulk. It can be used inside a sleeping bag to increase its thermal performance or on its own in warmer climates.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

Does this sleeping bag liner come with a storage bag?

Answer of Generated by AI and verified

Yes, this liner is supplied with a tough ripstop carry case for convenient packing and transport.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

Is this liner treated to resist odors?

Answer of Generated by AI and verified

Yes, it features Polygiene® odour control technology, which helps to keep the liner fresher for longer between washes.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

Is the Lifeventure Thermolite Liner worth the investment for camping users?

Answer of Generated by AI and verified

The Lifeventure Thermolite Liner is a valuable addition for those seeking extra warmth and comfort during camping trips. Its lightweight, durable fabric and ability to increase warmth by up to 15°C make it a practical choice for enhancing your sleeping setup.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

How much warmth does this liner add to a sleeping bag?

Answer of Generated by AI and verified

This liner is designed to increase the thermal performance of a sleeping bag by up to 15°C (25°F), making it suitable for extending the range of your current sleep system into colder conditions.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

What are the dimensions and weight of this sleeping bag liner?

Answer of Generated by AI and verified

When unpacked, the rectangular liner measures 220 x 85 cm. It weighs 430g and packs down into a carry case with dimensions of 22 x 12 x 6 cm.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

What material is the liner made from?

Answer of Generated by AI and verified

This liner is made from Thermolite, a lightweight and durable synthetic fabric that is soft and stretchy for comfort. It is designed to wick perspiration and dry quickly.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

Does this liner have a hood?

Answer of Generated by AI and verified

Yes, it includes an integrated drawstring hood to help retain heat around your head for added warmth and comfort.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

Can I use this liner by itself without a sleeping bag?

Answer of Generated by AI and verified

Yes, you can use the liner on its own in warmer climates or when you need a lightweight and compact sleep solution.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

What seasons is this liner best suited for?

Answer of Generated by AI and verified

This liner is ideal for shoulder-season camping (spring and autumn) to boost the warmth of your existing sleeping bag. It can also be used to extend your bag's use into colder conditions.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

Is this liner suitable for both men and women?

Answer of Generated by AI and verified

Yes, this is a unisex product designed for adults.

* Generated by AI based on customer and product data

2026-09-10

Generated by AI and verified

Lifeventure Thermolite Liner-Rectangular sleeping bag

How does the Lifeventure Thermolite Liner compare to the Lifeventure Coolmax Liner-rectangular Sleeping Bag?

Answer of Generated by AI and verified

While both liners are designed for comfort, the Lifeventure Thermolite Liner offers enhanced warmth with its Thermolite insulation, increasing warmth by up to 15°C. The Coolmax Liner focuses more on moisture management and breathability.

* Generated by AI based on customer and product data

Ask a technical question about this product

Frequently bought together
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Use cases

Shoulder-Season Camping & Backpacking 100% Fit

This liner is ideal for adding warmth to your existing sleeping bag during cooler spring and autumn nights. Its ability to increase warmth by up to 15°C makes it a versatile addition for three-season adventurers.

Increases warmth by up to 15°C / 25°F,Thermolite insulation,Shoulder-season rating,Rectangular shape for comfort

Hostel & Travel Accommodation 90% Fit

When traveling or staying in hostels, this liner provides a personal, clean, and comfortable sleeping layer. The Polygiene odour control technology helps it stay fresh between washes, which is practical for multi-day trips.

Polygiene odour control,Lightweight (430g),Compact packed size (22 x 12 x 6cm),Includes carry case

Warm-Weather Solo Sleeping 80% Fit

On warm summer nights when a full sleeping bag is too much, this liner can be used by itself for a comfortable and breathable sleep. Its rectangular shape offers more room to move than a mummy-style bag.

Lightweight fabric,Rectangular shape (220 x 85cm),Thermolite insulation for minimal warmth,Drawstring hood

Extending Sleeping Bag Lifespan 80% Fit

Using this liner inside your primary sleeping bag helps keep the main bag clean from sweat and dirt, reducing the need for frequent washing which can degrade insulation over time. The Polygiene treatment further enhances hygiene.

Acts as a protective barrier,Polygiene odour control,Durable fabric

Best for

Ideal for Versatile Camping

This liner significantly boosts the warmth of your existing sleeping bag by up to 15°C, making it perfect for adapting to different conditions without buying multiple bags.

Great for Family Camping Trips

The rectangular shape offers comfortable room to move, and the Polygiene odour control treatment keeps it fresh between washes, which is ideal for shared or repeated use.

Perfect for Casual Campers

Benefits

FunctionalBoost Your Sleeping Bag's Performance

This liner significantly enhances the thermal performance of your sleeping bag. It is engineered with Thermolite insulation to increase warmth by up to 15°C, making it a versatile addition for cooler conditions.

Temperature rating: Increases warmth by up to 15°C / 25°F

New attribute increases warmth by: 15°C / 25°F

Insulation brand: Thermolite

FunctionalSpacious and Comfortable Design

Enjoy a more comfortable night's sleep with the liner's rectangular shape, which offers ample room to move. The generous dimensions of 220 x 85cm and an integrated hood provide extra space and coziness, enhancing your overall rest and enjoyment outdoors.

Shape of sleeping bag: Rectangular

Size and max user height: 220 x 85cm

Hood: yes

New attribute drawstring hood: yes

FunctionalLightweight and Easy to Pack

Designed for adventurers who prioritize a light pack, this liner weighs only 430g. It packs down into a compact size of 22 x 12 x 6cm and includes a carry case, making it exceptionally easy to transport without adding significant bulk to your gear.

Total weight: 430g

Packed size: 22 x 12 x 6cm

New attribute carry case included: yes

Material: lightweight

durable fabric

Ideal buyer profiles

The Shoulder-Season Camper

This individual enjoys camping and backpacking during the cooler, transitional months of spring and autumn. They prioritize staying warm and comfortable without the bulk of a full winter sleeping bag and value gear that extends the usability of their existing equipment.

This liner is ideal because it's specifically rated for shoulder-season use and can increase the warmth of a sleeping bag by up to 15°C. The Thermolite insulation provides significant thermal improvement, while the rectangular shape offers ample room for comfort.

The Versatile Traveler

This person travels to various climates and often stays in hostels, mountain huts, or uses borrowed gear. They need a lightweight, packable, and hygienic sleeping solution that can be used on its own in warm weather or to boost the warmth and cleanliness of other bedding.

The Polygiene odour control technology keeps it fresh between washes, and its ability to add significant warmth makes it adaptable for unpredictable conditions or as a standalone bag in warmer environments.

The Comfort-Focused Camper

This camper values comfort and a good night's sleep above all else. They prefer gear that feels less restrictive and adds a layer of coziness to their sleep system, whether they're in a tent, cabin, or campervan.

The spacious rectangular shape (220 x 85cm) provides more freedom of movement than a mummy-style liner. The lightweight, durable fabric and Thermolite insulation add a comfortable, warm layer to any sleeping bag, enhancing the overall sleep experience.

Competitive features

When evaluating sleeping bag liners, the Lifeventure Thermolite Liner stands out for its specific use case. While many liners focus on a single material like cotton or fleece, this product utilizes Thermolite fabric to add significant warmth without excessive bulk. We'll compare it to other liners from Lifeventure and Sea To Summit to see where it fits best.

Where it excels

The primary advantage of this liner is its ability to increase a sleeping bag's performance by up to 15°C, making it highly effective for shoulder-season camping or extending the use of your current sleeping system in colder conditions. It incorporates Polygiene® odour control technology, which helps keep the liner fresher for longer between washes, a key benefit for multi-day trips. The design includes a drawstring hood, which is a feature not always present in liners and is crucial for retaining heat around the head and neck area. Constructed from a soft, stretchy, and lightweight fabric that wicks perspiration, it offers comfort and moisture management, and can even be used on its own in warmer climates.

Consider alternatives if...

For campers who prioritize a natural feel over thermal performance, a model like the Lifeventure Cotton Liner Ultimate might be preferable, as it uses cotton fabric instead of the synthetic Thermolite. If maximum thermal addition is the goal, a fleece liner such as the Sea To Summit Reactor Fleeceweight could offer a different level of warmth, though potentially with more bulk.

Verdict

The Lifeventure Thermolite Liner-rectangular Sleeping Bag is an excellent choice for campers looking to significantly boost the warmth of their existing sleeping bag. Its use of Thermolite fabric, combined with features like a drawstring hood and Polygiene® odour control, makes it a versatile and high-performing accessory for cold conditions. While cotton or fleece liners have their place, this product excels at adding substantial warmth without adding significant weight or bulk.

Specs comparison

Favorite On Favorite Off
Favorite On Favorite Off
Favorite On Favorite Off
Materiallightweight, durable fabricCoolmax fabric100% cottonlightweight, durable fabric
Insulation TypeInsulated syntheticInsulated syntheticInsulated syntheticInsulated synthetic
Packed Size22 x 12 x 6cm20x9 x 5cm21 x 10 x 8cm22 x 12 x 6
Season Ratingshoulder-seasonSummer-Shoulder-season
Fill MaterialSyntheticSyntheticCottonInsulated synthetic
Hoodtrue--true
Temperature RatingIncreases warmth by up to 15°C / 25°F--Increases warmth by up to 15°C / 25°F
Compressed Volume1.58 liters1.8 liters4.2 liters1.58 liters
Shape Of Sleeping BagRectangularRectangularRectangularMummy
Temp Rating Comfort15 °C--15 °C
Insulation BrandThermolite--Thermolite
Total Weight430g296g433g430g
UseradultAdultadultAdult
Body Length220 cm220cm220 cm220 cm

Specs vs competitors

Favorite On Favorite Off
Materiallightweight, durable fabricPolyester
Insulation TypeInsulated syntheticPolyester
Season Ratingshoulder-season3-Season
Fill MaterialSyntheticSynthetic
Hoodtruetrue
Temperature RatingIncreases warmth by up to 15°C / 25°Fup to 18°C
Shape Of Sleeping BagRectangularMummy
Temp Rating Comfort15 °C18 °C
Total Weight430g430 g
Useradultadult
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