Steam moulded wooden seat ergonomically designed back for optimum posture support and comfort. Acrylic scratch resistant multicoated varnish. Super strong, glued, screwed and pinned construction for heavy school use. Reinforced with a cross bar between the front legs. Product made with hardwood selected from sustainable forests. Stackable for out of the way storage. Meets recommended EN1729 part 1 Primary Height Size Marks.