Spark Down Sleeping Bag Temperature:-1C the Frontier Collapsible Cup has

the Frontier Collapsible Cup has been engineered to be sleeker

3D Prebent Dura Flex knee pads

amplifying the warmth of the heat-trapping dimples by 15%

Mesh lined to allow air flow

’ and permanently removing odours using natural silica particles

Spark Down Sleeping Bag Temperature:-1C the Frontier Collapsible Cup hasIf you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you. Filled with RDS certified 850+ fillpower goose down treated with a non PFC Ultra Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super breathable 10 denier liner fabric, while a 10D shell with a non PFC DWR plus a highly water repellent hood and footbox fabric shed