LA SIESTA single hammock Sonrisa Lime can be left outside all summer! Sonrisa is made of HamacTex® (polypropylene). This fibre is weatherproof, fast-drying and surprisingly similar to cotton in look and touch. Sonrisa is from Colombia, where hammocks have always been an essential part of everyday life. A typical characteristic of all hammocks manufactured in Colombia is the open-loop-suspension.