The chairs and sofas are hand woven in a 15mm or 50mm wide marine grade 100% olefin braided rope. It has a solid rubber core to give a more substantial and tactile quality product – specially selected by Alexander Rose to ensure that the rope does not become saturated and will dry quickly, even after heavy downpours of rain. The rope can also be cleaned with warm soapy water and a soft micro-fibre cloth. Do not use abrasive cleaners such as a brush or scourer. So yes the Cordial rope furniture can be left out all year round.