I spent months online (checking reviews and watching videos), planning how to stay warm at night during this trip. After much thought, I bought the Sea to Summit Spark SP1 sleeping bag, mainly for it´s weight and compressed volume. Although it´s filled with ultra-dry 850+ loft 90-10 down, I´m pretty sure it won´t be warm enough at Andes ‘high altitudes… but if necessary it can be paired with a liner and/or a vivisac (+ all the clothes I´m carrying).
Features:Contoured mummy; 10D Pertex® Quantum shell for minimal weight and bulk; sewn through lateral baffles for optimal weight/bulk/warmth ratio; 55/45 fill ratio; contoured hood with drawcord; tapered footbox; 1/3 length YKK #3 side zip; includes lightweight 15D Ultra-Sil® compression bag, mesh storage cell and laundry bag.
Down: ULTRA-DRY Down™ 850+ Loft 90/10 European Goose Down
Fill weight: Regular 180g | 6.3oz Long 200g | 7oz
Bag weight: Regular 348g | 12.3oz Long 390g | 13.8oz
Length / zip options: Regular – left 1/3 length zip Long – left 1/3 length zip
Season ratings: Summer/Spring/Autumn
Degree: 46ºF (8ºC)
Comfort rating: 54ºF (12ºC)
Lower limit rating: 23ºF (-5ºC)
Suggested use: Travel; Adventure racing; Summer cycle touring; Liner bag; Ultra lightweight hiking; Ultra lightweight alpine climbing
Compressed volume*: 1.55 litres
Compression bag: 3XS – 2.5L to 1L