All TreePod Cabana & Lounger models are made of canvas and you should put your TreePod away inside on windy and rainy days. Canvas (and therefore TreePods) is not designed to be left outside for extended periods of time. Exposure to prolonged moisture, wind and/or sun will cause rot, mildew, mould, rust and/or a build-up of natural matter which deteriorates the overall product prematurely and causes unnecessary damage. Leaving a TreePod up during windy and rainy days/outside all year round increases the risk of any warranty becoming void.