The Tripp Trapp Nordic Grey cushion yarn is dyed with IndiDyeusing extracts from acorns. With no hazardous chemicals, no wastewater and a low environmental impact, IndiDye uses truly eco-smart dyeing technology. The ultrasonic dyeing process eliminates wastewater in the dyeing process, and water consumption is significantly reducedcompared to conventional dyeing. Through lower dyeing temperatures and shorter dyeing times, use of energy and emissions are much lower compared to conventional dyeing.