A sleeping bag liner can add up to 15 degrees warmth to your sleeping bag.

 Just because you’re camping in nature doesn’t mean you can’t feel like you are staying at the Ritz. A sleeping bag liner fits comfortably inside your sleeping bag and depending on its make can offer you improved insulation and added softness. Sleeping bag liners can add 10 to 15 degrees (Fahrenheit) of warmth to your body when used solo or with your sleeping bag.    Sleeping bag liners may be designed for specific type sleeping bags (such as rectangular bags) so be sure to review the brand specifications.  And sleeping bag liners are designed with a variety of materials such as fleece, silk, cotton, organic cotton or thermolite (to name a few) and offer different performance and functions. 

Sea to Summit 100% Premium Silk Travel Sleeping Bag Liner The Sea to Summit Silk Premium Travel Liner is perfect for keeping a sleeping bag clean and for hostel or budget hotel traveling. The silk premium liner comes packaged in its own mini nylon stuff sack. Not only are these the best quality silk liners out there, they’re the lowest priced as well. Assorted colors.

• Silk sleeping bag liners offer silky softness against your skin and insulation.  Silk adjusts naturally to changing temperatures and is super light (weighing about 6.3 oz).  Silk is a gentler material but is durable enough for repeat hand washings so that you can sleep in your bag night after night and feel like you’re sleeping with clean sheets. Outside Magazine granted Cocoon’s silk sleeping bag liner the 2007 Gear of the Year Award.
• Cotton sleeping bag liners are economical and offer durability with their high thread count.  It’s lightweight weighing about 14 oz and can be used on its own for hot summer night camping trips.
• Fleece sleeping bag liners:  can add 15 degrees of warmth to your sleeping bag. Fleece can dry quickly, is breathable and can be used solely on warm nights. Some styles offer hoods and zipper sides just like a sleeping bag.
• Thermolite:  offer 15 degrees of warmth, is very lightweight at approximately 9 ounces and remains extremely breathable.  It’s washable, quick drying and odor resistant.  It’s so compact it can compress to a tiny 3 by 5 inches (about the size of a package of ramen noodles).
Sea to Summit Reactor Thermolite Sleeping Bag Liner

Adding a reusable sleeping bag liner to your nature excursions can offer added warmth, added softness and the ease of daily hand washings for a fresh night’s sleep.

In cold winter months, a sleeping bag liner needs to be added to your list of survival gear.