Sea to Summit Spark SpIII Sleeping Bag (Regular)
The Sea to Summit Spark™ Series is what you reach for when you need a high performance sleeping bag without the weight. The Spark™ Series spans everything from an ultralight liner to an expedition weight mid-winter bag. The Spark SpIII is the warmest bag of the Spark series with a EN comfort rating of -2°. This Sleeping bag can be used as a mid-winter bag on lightweight expeditions and adventure sports. The mixed baffling on this bag prevents the down filling from moving away while you sleep, eliminating cold spots. This sleeping bag also features a contoured mummy shape and is made from premium RDS certified goose down for efficient insulation.
Spark Sleeping Bag Features:
- Contoured mummy shape for efficient insulation
- Mixed baffling – vertical upper & horizontal lower
- Extremely lightweight and compact
- Water repellent polymer treatment applied
- Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room
- Includes lightweight Ultra-Sil™ Nano compression bag for compact storage
- RDS Certified Down
The EN13537 is a European standard for sleeping bags that provides three temperature levels to help guide you when choosing a bag.
Comfort – The temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you are female or consider yourself a cold sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for.
Lower Limit The temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for.
Extreme This is a survival only rating for a standard woman. Between the lower limit and the extreme rating a strong sensation of cold must be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only; we do not recommend you rely on this rating for normal use.
850+ Fill Power indicates that 1 oz of down will re-expand to over 850 cubic inches after compression. Higher loft means that less down can be used to achieve the same temperature rating – important for performance sleeping bags. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) – a copy of the certification is supplied with every Sea to Summit sleeping bag.
ULTRA-DRY Down™ is a permanent nano-level water repellent polymer treatment applied to our down which protects it from external moisture and condensation from inside the bag virtually eliminating the negative effects moisture has on down.