Top 5 Ultralight Sleeping Bag Liners of 2023

Hiker outside their tent enjoying the winter sun, resting in a sleeping bag with a cozy sleeping bag liner

In this post, we'll take a look at:

When selecting an ultralight sleeping bag liner, keep in mind factors like material, weight, and added warmth.

Choosing the wrong one could result in discomfort and disrupted sleep during your outdoor escapades.

Our TOP 5 guide is here to assist you in making the right choice, ensuring a cozy and restful night’s sleep wherever you go.

Top Ultralight Sleeping Bag Liner Picks

  1. Most Ultralight: Western Mountaineering Hot Sac (3.74oz/106g)
  2. Best Overall: Sea to Summit Silk Stretch Panel Liner (3.95oz/112g)
  3. Best Value: RAB Silk Ascent Sleeping Bag Liner (3.80oz/108g)
  4. Best for Hygiene: Cocoon Silk MummyLiner (4.09oz/116g)
  5. Budget Option: Nemo Tracer Sleeping Bag Liner (8.25oz/234g)

1. Most Ultralight
Western Mountaineering Hot Sac

Ultralight Sleeping Bag Liner: Western Mountaineering Hot Sac

Key Specs

Weight: 3.74 ounces (106 grams)
Material: nylon
Price: $$$


✅ Ultralight

✅ Small pack size


❌ Relatively expensive

When it comes to colder trips, Western Mountaineering’s black and gold vapor barrier liner is your essential companion.

This innovative Hot Sac VBL not only prevents heat loss but also stops radiant heat loss with its reflective coating. Lightweight and compact, it’s a must-pack item for ultralight hikes or emergencies.

And the best part? We found no real drawbacks.

2. Best Overall
Sea to Summit Silk Stretch Panel Liner

Ultralight Sleeping Bag Liner: Sea to Summit Silk Stretch Panel Liner

Key Specs

Weight: 3.95 ounces (112 grams)
Material: silk and polyester
Price: $$


✅ Comfortable

✅ Various colors available


❌ Not for tall people

Experience the luxurious comfort of Sea to Summit’s premium AA Grade silk sleeping bag liner.

The lightweight and compact design is enhanced by stretch panels along the seams, ensuring a cozy sleep wherever you go.

While the liner’s quality is impressive, we noticed some drawbacks, such as tangling during sleep and its shorter length.

If you’re not tall or using a shorter pad, this liner could be a suitable choice to enhance your sleep experience.

3. Best Value
RAB Silk Ascent Sleeping Bag Liner

Ultralight Sleeping Bag Liner: RAB Silk Ascent Sleeping Bag Liner

Key Specs

Weight: 3.80 ounces (108 grams)
Material: silk
Price: $


✅ Relatively affordable

✅ Great quality material


❌ Not for tall people

Crafted from 100% silk, Rab’s Silk Ascent Sleeping Bag Liner enhances your ultralight experience with added comfort and warmth. Its lightweight design and compact size make it a valuable addition to your gear.

Whether you want to elevate your sleep system or safeguard your sleeping bag, this liner is a versatile choice. It provides approximately 5% of extra warmth to your bag, ensuring a cozier rest in the outdoors.

4. Best for Hygiene
Cocoon Silk MummyLiner

Ultralight Sleeping Bag Liner: Cocoon Silk MummyLiner

Key Specs

Weight: 4.09 ounces (116 grams)
Material: silk
Price: $$


✅ High quality

✅ Small pack size


❌ A bit fragile

Discover the versatility of Cocoon’s Silk mummy liner for your outdoor adventures. It protects your sleeping bag, adds extra warmth (up to 8.4°F), and feels cool in the summer.

Its compact size and lightweight nature make it a practical choice for various trips.

However, it’s important to note that some users have reported concerns about the fabric’s tear resistance, so handling it with care is advised.

5. Budget Option
Nemo Tracer Sleeping Bag Liner

Ultralight Sleeping Bag Liner: Nemo Tracer Sleeping Bag Liner

Key Specs

Weight: 8.25 ounces (234 grams)
Material: polyester fiber
Price: $


✅ Relatively affordable

✅ Great Warranty


❌ No warmth factor listed

❌ Relatively heavy

Discover Nemo’s Tracer sleeping bag liner – soft and cozy for added comfort on your adventures.

It protects against sweat and odors, made with eco-friendly fabric that extends your sleeping bag’s range.

While not listing warmth and slightly heavy, it’s still a valuable gear addition for outdoor comfort.

How to Buy the Right Sleeping Bag Liner

Picking the right sleeping bag liner is crucial for a comfortable outdoor adventure. In total, there are five types of sleeping bag liners.

  • Silk liners are super light at about 5 oz and add approximately 5 to 8 degrees of warmth, but they can be somewhat pricey.
  • Cotton liners are sturdy and provide an additional 10 to 12 degrees of warmth, but they are bulky and heavy.
  • Fleece liners are warm, increasing warmth by 20 to 25 degrees, but they occupy more space.
  • Synthetics like CoolMax® are breathable and moisture-wicking, offering a modest increase of around 5 to 8 degrees Fahrenheit, with some stretch for comfort, but they may not fit the budget-conscious traveler.
  • Insulated liners like Thermolite® claim up to 25°F of extra insulation, using hollow-core fiber insulation and drying 50% faster than cotton, but they can be relatively expensive and might not be necessary in milder climates.

Your selection should be guided by the prevailing weather conditions (particularly the time of year), the weight of your backpack, and your personal comfort preferences.

If you’re looking to become an expert on this topic, don’t forget to explore our in-depth post for a more comprehensive understanding of choosing the perfect sleeping bag liner.

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