Cold weather camping can be even more grim, and tents aren't renowned for their sound insulation either. Derek O'Sullivan reckons he's solved these issues with Thermo Tent, which his firm bills as the world's first correctly insulated tent.There are several versions of Thermo Tent, but the Thermo Tent 3 and Thermo Tent 6 are probably the most notable. As its name implies, the former is a three-person tent, weighing 11 kg (24 lb) and measuring 3 x 1.8 x 1.5 m (9.8 x 6 x 5 ft). The Thermo Tent 6, meanwhile, weighs roughly 50 kg (110 lb), measures 7 x 4 x 2.2 m (23 x 13 x 7.2 ft), and features two separate sleeping areas, 4 berth and 2 berth, both with their own doors.

Both tents come with a simple foot pump-based vacuum system that reduces their volume when packed. Still, given their weight, you're not going to be hiking around with one of these on your back.