All Season Fleece Sleeping Bag Liner Mummy Shape - Adds Up to 27F

In this review of the Litume all season fleece sleeping bag liner, the bottom line is simple: this is a lightweight, packable option for campers and travelers who need extra warmth without bulk. The reviewer found it best for backpacking, car camping, and travel when a full cold-weather bag is impractical, and the single biggest reason to buy is the liner's ability to add substantial warmth while remaining soft and compressible. Our review highlights how the drawstring hood, mummy cut and velvet microfleece combine to trap heat and preserve mobility overnight.

Key Features

• Adds up to 27F: Provides a clear warmth boost to most sleeping bags so you can extend use into colder conditions without carrying a heavier bag.
• Anti-static velvet microfleece: Feels soft against skin while breathing enough to avoid feeling clammy during active nights outdoors.
• Lightweight and compressible: At about 16.6 oz the liner packs into the included stuff sack, making it easy to carry in a backpack or luggage.
• Mummy shape with drawstring hood: Locks in heat around the head and shoulders while the foot box gives some room to move toes comfortably.
• Durable construction: Imported build with thicker fleece than typical liners gives a reassuring sense of quality for repeated outdoor use.

Who It's For

The liner suits backpackers, weekend car campers, and travelers who want to add warmth without replacing their existing sleeping bag; its light weight and stuff sack make it practical for multi-day trips where every ounce matters. It is also a good choice for anyone who values soft, skin-friendly fabrics since the velvet microfleece is gentle and non-irritating.

This is less suitable for extreme alpine expeditions where a purpose-built -20F or lower sleeping system is required, or for users who prefer a fully insulated sleeping bag with integrated loft instead of a supplemental liner. If you need full waterproofing or a liner with technical lofted fill, look elsewhere.

Pros & Cons

Pros

• Noticeably increases warmth of an existing sleeping bag while remaining very light to carry.
• Soft anti-static velvet microfleece offers comfort comparable to home bedding.
• Mummy cut with drawstring hood helps retain heat where it is most needed.
• Compressible design and included travel sack make storage and transport easy.

Cons

• Not a replacement for a true heavy-duty winter sleeping bag when extreme cold protection is required.
• The claimed temperature increase will vary by user and sleeping system, so exact performance is situational.

Specifications

Brand	Litume
Material	Anti-static velvet microfleece
Shape	Mummy with drawstring hood and foot box
Warmth Increase	Adds up to 27F / 15C
Weight	About 16.6 oz / 470 g
Origin	Made in Taiwan / Imported
Includes	Stuff sack for travel and storage

Our Verdict

The Litume fleece mummy liner is a practical, well made accessory for campers who need extra warmth without significant weight penalty; its soft velvet microfleece and hooded design make cold nights more comfortable and it represents good value for adding seasonal versatility to an existing bag.

Frequently Asked Questions

How much warmth will this liner add?
The liner is designed to add up to 27F / 15C of warmth, though actual results depend on your base sleeping bag and conditions.

Is it comfortable against bare skin?
Yes, the anti-static velvet microfleece is soft and breathable, chosen to be gentle on skin without making you feel sweaty.

Can it be packed small for backpacking?
Yes, it weighs about 16.6 oz and compresses into the included travel sack for easy carrying.