 In others the tarpaulin is hung separately using either the hammock's integrated ridge line, or a separate ridge line placed under or over the tarpaulin.Some tarps have an asymmetrical pattern which matches the shape of the hammock, but the majority of hammock campers use a hex-shaped tarpaulin, many of which have a catenary shape for strength against wind and reduction in size and weight.The diamond-shape tarpaulin is also used by some.