Mummy with Hood - Long

Simple and durable, yet refined, your perfect companion for uncomplicated summer adventures. The Treeline Sleeping Bag is a budget down bag that is ideal for three season use when you’re confident the temperature won’t drop far below freezing. While STS have given this design a little extra room around the shoulders and hips for freedom of movement, the relaxed mummy shape still provides efficient warmth and heat retention when you need it. Filled with 400g of compressible and lofty 600+ down,...

Simple and durable, yet refined, your perfect companion for uncomplicated summer adventures. The Treeline Sleeping Bag is a budget down bag that is ideal for three season use when you’re confident the temperature won’t drop far below freezing. While STS have given this design a little extra room around the shoulders and hips for freedom of movement, the relaxed mummy shape still provides efficient warmth and heat retention when you need it. Filled with 400g of compressible and lofty 600+ down,...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Winter Cycle touring, Ultra lightweight Hiking, Ultra lightweight alpine climbing, Snow CampingSeason...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Winter Cycle touring, Ultra lightweight Hiking, Ultra lightweight alpine climbing, Snow CampingSeason...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Adventure racing, Winter Cycle touring, Liner bag, Ultra lightweight Hiking, Ultra lightweight alpine...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Adventure racing, Winter Cycle touring, Liner bag, Ultra lightweight Hiking, Ultra lightweight alpine...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Adventure racing, Cycle touring, Liner bag, Ultra lightweight Trekking/ Hiking, Ultra lightweight alpine...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Adventure racing, Cycle touring, Liner bag, Ultra lightweight Trekking/ Hiking, Ultra lightweight alpine...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Adventure racing, Summer cycle touring, Liner bag, Ultra lightweight Trekking/ Hiking, Ultra lightweight...

Ultra-light and technical, the Spark Series bags are designed to keep you as warm as possible while minimising packed weight and size. The Spark Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.  Suggested use : Travel, Adventure racing, Summer cycle touring, Liner bag, Ultra lightweight Trekking/ Hiking, Ultra lightweight...

The Alpine Series combines STS most technical sleeping bag features to deliver reliable performance while cocooning you in the highest quality RDS 850+ Loft Goose ULTRA-DRY Down. Designed for high altitude mountaineering and arctic conditions, the contoured mummy design delivers efficient insulation, while our updated expedition sizing provides space for extra clothing to be worn inside the bag. The anatomically shaped and oversized footbox can comfortably accommodate boots when necessary....

The Alpine Series combines STS most technical sleeping bag features to deliver reliable performance while cocooning you in the highest quality RDS 850+ Loft Goose ULTRA-DRY Down. Designed for high altitude mountaineering and arctic conditions, the contoured mummy design delivers efficient insulation, while our updated expedition sizing provides space for extra clothing to be worn inside the bag. The anatomically shaped and oversized footbox can comfortably accommodate boots when necessary....

The Alpine Series combines STS most technical sleeping bag features to deliver reliable performance while cocooning you in the highest quality RDS 850+ Loft Goose ULTRA-DRY Down. Designed for high altitude mountaineering and arctic conditions, the contoured mummy design delivers efficient insulation, while our updated expedition sizing provides space for extra clothing to be worn inside the bag. The anatomically shaped and oversized footbox can comfortably accommodate boots when necessary....

The Alpine Series combines STS most technical sleeping bag features to deliver reliable performance while cocooning you in the highest quality RDS 850+ Loft Goose ULTRA-DRY Down. Designed for high altitude mountaineering and arctic conditions, the contoured mummy design delivers efficient insulation, while our updated expedition sizing provides space for extra clothing to be worn inside the bag. The anatomically shaped and oversized footbox can comfortably accommodate boots when necessary....

The THERMOLITE® Reactor Extreme liner is Sea to Summit’s warmest knitted sleeping bag liner. If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. Plus in warmer weather, it can be used as a ‘stand alone’ sleeping bag. The hollow core fibres of the THERMOLITE® fabric work like a polar bear's fur and, along with the knitted structure, trap plenty of insulating air. Super soft and amazingly stretchy, the Reactor Extreme uses a heavier...

The Expander liner is made from a premium stretch knit poly-cotton, making it super stretchy and even warmer than a standard cotton weave liner. The stretch properties allow the Expander to move with you as you sleep, vastly increasing comfort and minimising tangles. Antimicrobial protectionAll of the Expander Liner series have been impregnated with an antimicrobial treatment which won’t wash out of the liner, and which does not use nano sized particles. This treatment restricts the...

The Expander liner is made from a premium stretch knit poly-cotton, making it super stretchy and even warmer than a standard cotton weave liner. The stretch properties allow the Expander to move with you as you sleep, vastly increasing comfort and minimising tangles. Antimicrobial protection All of the Expander Liner series have been impregnated with an antimicrobial treatment which won’t wash out of the liner, and which does not use nano sized particles. This treatment restricts the growth of...