In need of a new sleeping bag? Sea to Summit’s unisex Ascent and female-specific Altitude down-filled sleeping bags are designed to keep you cosy on camps from spring through to autumn and sport a clever triple zip system to help you regulate heat during the night or even convert the bags into a quilt. Are these among the best sleeping bags out there for three seasons of adventure? We tested the Ascent out in chilly conditions to see how it performed.
