Normann Copenhagen - Chair Mat - Brown - Seagrass - Designer Peter Hiort-Lorenzen; "Normann Copenhagen Chair Brown Cane & fibres. Dimensions: W 51.6 x D 53 cm x H 79 cm - Seat: H 45 cm. With a focus on innovation and circularity, the Mat project aims to create a Shell chair using materials with minimal environmental impact. Manufactured using an unprecedented production technique, the chair's Shell is made from Hemp or Eelgrass, a type of Navy seaweed. Durable and extremely renewable, these natural resources offer an ecological alternative to plastic. Anchored in the 3R princi