Perfect for class time or play time! Bentwood Chairs are made of multi-ply birch with a uni-body design contoured for healthy posture, smooth rounded edges, and non-scuff boots to reduce noise and protect flooring.Chairs stack four high to save space when not in use. Check for loose or worn parts periodically and tighten or replace as necessary. Use a clean, damp cloth or sponge with mild soap, non-bleach detergent, or general purpose cleaner. Abrasive cleaners or powders should not be used as they may permanently dull or scratch the surface. Remove chairs from service if boots become loose or are missing. Replacement boots available.