Sea to Summit Spark Down Sleeping Bag -1C|30F - Long Beluga

Product Description

The Sea to Summit Spark Down Sleeping Bag is the definitive choice for those who want to move fast and light without sacrificing a good night's rest. Whether you are trekking through mountain ranges or bikepacking across continents, this sleeping bag offers an exceptional warmth-to-weight ratio. The ergonomic mummy shape is designed to retain heat efficiently, while the Long size provides extra room for taller adventurers to stretch out comfortably after a demanding day. The construction of this bag focuses on maximum efficiency. The translucent 10D shell and lining keep the weight at an absolute minimum while remaining breathable. The high-loft goose down is treated to ensure it maintains its insulating properties even when exposed to damp conditions, making it reliable for multi-day trips where weather can be unpredictable. The zipper is designed for easy access and temperature regulation, allowing you to vent when things get too warm or seal in the heat when the temperature drops towards freezing. Technical performance is at the heart of the Spark series. By using 850+ Fill Power goose down, the bag achieves incredible compressibility, fitting easily into small bike bags or compact hiking packs. The hybrid baffle construction—featuring box baffles in the torso and a sewn-through construction in the legs—optimizes heat retention where it matters most while shedding unnecessary grams elsewhere. This ensures you stay warm down to the lower limit of -1°C without carrying a bulky load. Temperature Rating: Comfort 4°C, Lower Limit -1°C Insulation: 850+ Fill Power Goose Down Material: 10D Nylon shell and lining Shape: Ergonomic Mummy Fits up to: 198 cm Weight: 536 grams Fill Weight: 305 grams Compressed Volume: 5.1 Liters Includes lightweight compression sack and storage cell