19 Outdoors Stacking Arm Chair Set of 2 are designed by Butterfield Brothers for NINE. They are part of the outdoor collection 19 Outdoors which is inspired by the charity project 19 Chairs. During the Covid-19 lockdown, the design duo designed and manufactured 19 chairs in 19 days in South London, after which the chairs were sent to 19 different designers and artists to be redesigned with older people in mind. The results were displayed in an exhibition in London and contributed to an online charity auction in aid of Age UK. The furniture fits well in many different outdoor environments, from small balconies to restaurant terraces. These stackable outdoor chairs are made of powder-coated aluminium.