Here's what other sites are saying:
By using Terra Nova Superlite fabrics, and removing any unnecessary extras like windows and pole "sockets" Terra Nova has reduced both the weight and pack size. Whats more these Superlite models will compress even smaller, giving extra pack space for your other kit.Bothy bags are increasingly used by mountain rescue teams, outdoor centers and youth groups as emergency shelters and should always be in the bottom of your pack. They create a surprisingly warm and sheltered environment in use and are ideal for lunch stops or accidents. Terra Nova Bothies have allowed their occupants to wait out storms from an hour to a week long in hostile conditions.