The Therm-a-Rest Tranquility 4 Wing has you covered when you're camping close enough to the seashore that you can hear the harbor bells as you drift off to sleep or you're looking for open-air shelter on your summer river trip. Designed to replace the rainfly of Tranquility 4 Tent, this 3-point tarp system offers greater ventilation on hot summer days while also extending protection from the sun and inclement weather. Lightweight aluminum poles give the system structure that lets you use it as a comfortable open-air shelter when you're journeying through the desert and need protection from the baking sun.