HAY’s 13 Eighty chair designed by Dutch designers Scholten & Baijings is aptly named after the number of tiny holes in the moulded polypropylene shell. These perforations create a characteristic aesthetic, where transparency and a play of light and shadows add to the chair’s expression, while the variations in the sizes of the holes bring a sense of movement to the visual appearance. They also have a functional use in draining rainwater off when the chairs are used outdoors. This chair is in a stackable design that features steel legs with a weather-resistant coating to make it suitable for outdoor use.