Sea To Summit Spark SpIV - Regular

Spark SpIV
Our Spark™ Series bags is what you reach for when you need a high performance sleeping bag but don’t want to be weighed down by one.
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.
Regular
Long
Recommended User Height
up to 183 CM
up to 198 CM
Packed dimensions
ø18 x 40 CM
ø18 x 40 CM
Volume Compressed
6.6 L
7.7 L
Compression sack volume (compressed)
10 to 3.3 L
10 to 3.3 L
Weight
880 G
985 G
Fill Weight
620 G
700 G
Internal Chest Circumference
155 CM
162 CM
Internal Hip Circumference
135 CM
142 CM
Internal Foot Circumference
94 CM
100 CM
850+ Loft
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™
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.
All Sea to Summit sleeping bags use only down which is certified according to the Responsible Down Standard. The RDS is helping shift the entire down and feather industry towards more humane animal rearing and handling practices.
Overseen by the industry leading Textile Exchange, the RDS requires independent, third-party assessments of all aspects of animal rearing and handling throughout the entire supply chain. By using only down that meets the audited requirements of the RDS, we can have confidence that each phase of the collection process has been completed with the welfare and ethical treatment of waterfowl in mind.