Lining up for a great sleep - Why use a sleeping bag liner

Is a sleeping bag liner essential for outdoor adventures? That depends on whether you enjoy being clean and warm. 

In NZ the weather changes frequently, warm and clear one minute, cold and wet the next. Regulating your body temperature through these meteorological mood swings is essential for anyone spending the night outside.

While often overlooked, a thermal sleeping bag liner can provide numerous benefits that go beyond just comfort. Let’s take a quick look at why using a sleeping bag liner is a smart choice for every camper.

  1. Increased Warmth

One of the primary reasons to use a sleeping bag liner is the added warmth it provides. A thermal liner, like a Domex Thermolite liner, can add valuable degrees to a night of sleep in chilly weather, sometimes the difference between sleeping and shivering awake all night long. 

  1. Hygiene and Cleanliness

A liner acts as a barrier between your body and the sleeping bag, absorbing sweat, dirt, and oils. This keeps your sleeping bag cleaner for longer. Washing a liner is as simple as chucking it in the machine with everything else when you get home. Washing your sleeping bag is more of a commitment. It’s obvious which is easier. Liner wins. 

  1. Versatility in Warmer Weather

While liners are great for adding warmth, they can also be used on their own in warmer climates. On hot summer nights, a sleeping bag might be too much insulation, but a lightweight liner can provide just enough coverage to keep you comfortable without overheating. Some hardcore explorers just use a liner as a standalone option for ultralight backpacking in mild conditions.

  1. Comfort and Softness

A liner, particularly one made of silk or Thermolite, can add a layer of snuggly softness, making your sleeping setup more pleasant. This can make a big difference on long trips when comfort becomes a priority.

  1. Extended Sleeping Bag Lifespan

Sleeping bags are an investment, and using a liner can help prolong their lifespan. Since the liner takes most of the wear and tear, your sleeping bag will last longer, retaining its insulating properties and overall performance. This can save you money in the long run by reducing the need to replace your bag as frequently.

  1. Lightweight and Packable

All Domex sleeping bag liners are lightweight and pack down small, making them an easy addition to your gear without adding significant bulk or weight. Whether you're backpacking, camping, hunting, or travelling, a liner can easily fit into your pack without taking up much space.

  1. Multifunctional

A sleeping bag liner has the ability to step into a pinch and pull double-duty. We’ve heard stories of adventurers using their liner as a scarf and as a towel. A Thermal sleeping bag liner is also the perfect travel blanket for long-haul flights, fitting easily into your carry-on.


A sleeping bag liner is more than just an accessory; it’s a valuable addition to any camper's gear. Whether you're looking to stay warmer, keep your sleeping bag clean, or just add a touch of comfort to your sleep setup, a liner offers versatility and protection. So next time you're heading outdoors, add a liner to your gear list—you'll be glad you did!