Lower Limit: -17° C / 1° F

Offering the perfect backpacking balance of comfort vs weight, the Altitude Series sleeping bags have more space than traditional mummy bags, yet still provide the thermal efficiency you need when exploring above the tree-line. The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it’s not. The half zip on the left side of the bag provides freedom of movement for both arms, additional ventilation and...

Offering the perfect backpacking balance of comfort vs weight, the Altitude Series sleeping bags have more space than traditional mummy bags, yet still provide the thermal efficiency you need when exploring above the tree-line. The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it’s not. The half zip on the left side of the bag provides freedom of movement for both arms, additional ventilation and...

Offering the perfect backpacking balance of comfort vs weight, the Altitude Series sleeping bags have more space than traditional mummy bags, yet still provide the thermal efficiency you need when exploring above the tree-line. The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it’s not. The half zip on the left side of the bag provides freedom of movement for both arms, additional ventilation and...

Light, warm, comfortable and most importantly, adaptable. The Ascent is the STS sleeping bag of choice for most adventures, most of the time. Offering the perfect backpacking balance of comfort vs weight, the Ascent Series sleeping bags have more space than traditional mummy bags, yet still provide the thermal efficiency you need when exploring above the tree-line.The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple...

Light, warm, comfortable and most importantly, adaptable. The Ascent is the STS sleeping bag of choice for most adventures, most of the time. Offering the perfect backpacking balance of comfort vs weight, the Ascent Series sleeping bags have more space than traditional mummy bags, yet still provide the thermal efficiency you need when exploring above the tree-line.The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple...

Light, warm, comfortable and most importantly, adaptable. The Ascent is the STS sleeping bag of choice for most adventures, most of the time. Offering the perfect backpacking balance of comfort vs weight, the Ascent Series sleeping bags have more space than traditional mummy bags, yet still provide the thermal efficiency you need when exploring above the tree-line.The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple...

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...