Sea To Summit Spark SpIV

All Spark sleeping bags feature ultra-light weight, minimal pack size and excellent thermal performance. In the SpIV, continuous sewn vertical box chambers contain an extra amount of insulation and reduce cold bridges. The expedition size ensures extra space for additional layers of clothing. Vertical chambers in the chest area optimize down distribution and prevent slippage. A full-length zipper with two sliders allows easy entry and provides variable ventilation. A zipper channel, hood and thermal collar prevent heat loss.Ultra-Dry DownUltraDry Down is a PFC-free, water-repellent down treatment used in all Sea to Summit sleeping bags. UltraDry Down retains over 60% more fill power, absorbs 30% less moisture, and dries out 60% faster than untreated down - meaning the down insulates better even when damp. The treatment also inhibits bacterial growth and extends the life of your sleeping bag. The UltraDry Down treatment is an environmentally friendly application. Details: - Ultralight 7D and 10D fabric for minimal weight and pack size - RDS certified 850+ loft premium goose down with Ultra-Dry - Down treatment for maximum insulation values - Contoured mummy shape ensures efficient insulation - Vertical chest chambers protect against cold spots - Note: Cannot be zipped together with other sleeping bags Down Blend (Down / Feather): 90 / 10 Bulking Power (cuin): 850 cuin Type: mummy sleeping bag Season Season: winter Material Lining Material Designation: 100% nylon Filling: duck down Special Features: Contains non-textile parts of animal origin Outer material designation: 100 % nylon Body size measurement (max.): 183 cm Sleeping bag category: down sleeping bag Shape: Mummy shape Temperature range Comfort temperature (°C): -8 °C Limit temperature: -15 °C Extreme temperature: -36 °C.