Hammock manufactured by Grand Trunk comes in different designs and materials. One of the common materials used for hammock is parachute. Plenty reviews related this material mention that parachute has great stretch property. This parachute feature allows a hammock to be strong and flexible at the same time. It is not surprising that double hammock uses the same material to accommodate more weight. Due to this benefit, hammock by Grand Trunk is qualified as product with high standard. In addition to this feature, it also includes aluminum carabineers on the package as well. Those accessories will help you hanging the hammock on stable spot easily.