The synthetic fill is super-lightweight and delivers warmth without adding bulk. It's shielded by a ripstop nylon outer that protects your bag from nicks and scratches for long-lasting performance.  Mummy-shaped bag with internal bungee adjustor cord Lightweight synthetic insulation Nylon Ripstop outer 2 season Left-sided zip Inner pocket Season rating: 2-3 Comfort rating: 4°C Limit rating: -1°C Extreme rating: -14°C Dimensions: 220x80x55cm Weight: 1.62kg