Some portable clothesline products are engineered for outdoor drying as they are constructed from galvanised steel, aluminium, and UV resistant plastics which makes them resilient to extreme weather. In windy conditions, however, we advise to either bring the portable clothesline inside or make sure they are securely anchored to the ground using weights or sandbags. Some smaller Hills airers are designed for indoor use only, it's best to check the product and user's manual for the recommended usage guidelines.