If you go for camping on cold season, you might want to consider bringing hammock with better insulation. Double hammock produced by Grand Trunk is made out of different fabrics. One of those fabrics is parachute. Parachute is not only famous for its strength and flexibility, but also its ability to prevent air escaping. Since warm air is conserved inside the hammock, it provides great insulation. Moreover, since this hammock is designed for two people, the parachute fabric used is able to suspend both of its occupants. The flexibility property of parachute material does not let the fabric to rip apart when it deals with extra weight. The parachute expands and stretches instead to compensate with the weight it holds.