Mummy Sleeping Bags
The lightweight, durable, and ultra-warm sleeping solution. Our high-performance mummy sleeping bags offer superior insulation and compact portability, perfect for camping and outdoor adventures.
Optimize WarmthMaximize Comfort
Maximize your outdoor comfort with Sea to Summit's mummy sleeping bags. Designed for adventurers seeking optimal warmth and efficiency, our mummy sleeping bags provide a snug fit that minimizes heat loss while ensuring a restful night’s sleep. Whether you're embarking on a multi-day trek, camping in cool weather, or exploring high-altitude terrains, our mummy sleeping bags deliver the perfect combination of lightweight performance and cozy warmth.
From the ultra-lightweight Spark series, ideal for minimalist backpackers, to the versatile Trek series, perfect for a range of climates and activities, Sea to Summit has a mummy sleeping bag to meet your specific needs. Each bag is designed with a focus on durability, packability, and comfort, making it easy to find the perfect sleeping bag for any adventure.
Frequently Asked questions
Do mummy sleeping bags keep you warmer?
Mummy bags have less space in the foot section than rectangular bags. This means less space that the sleeper needs to warm up, so – generally – a mummy bag is warmer than a rectangular bag of the same weight. However – the actual shape and construction of a mummy sleeping bag affect how warm it is; not all mummy bags insulate equally well.
What is the difference between tapered and mummy sleeping bags?
Generally, a ‘tapered rectangular’ bag has more room for the sleeper to move than a mummy bag - a tapered bag may be more comfort-oriented. However – mummy bag shapes vary significantly; some are very narrow. Sea to Summit mummy bags have enough room for the sleeper to move without compressing insulation at the knees and hips.
Can you sleep on your stomach and side in a mummy sleeping bag?
Mummy sleeping bag shapes vary significantly; some are very narrow, and do not work well for side-sleepers/stomach sleepers. Sea to Summit mummy bags – particularly the Comfort and Versatility models like the Ascent - have enough room for the sleeper to sleep comfortably in any position.
Can you zip two mummy sleeping bags together?
Not all mummy bags can be zipped together. Sea to Summit bags designed to ‘couple’ have side zippers that are the same length, so those unisex bags can be zipped to Women’s-specific bags regardless of the length of the bag. Read which bags can be zipped together here.
Is it better to roll or stuff a mummy sleeping bag?
A synthetic-insulated mummy bag should always be stuffed; rolling the bag means the direction of compression is always the same. This negatively affects the insulation in the footbox (at the center of the of the roll) most. Down bags can be stuffed or rolled; stuffing is usually better.
