This heavy duty Bankers Box Ergo Box features a triple layer of board on the end panels and a double layer on the sides and base, for durable, long lasting use. The boxes are supplied flat and feature time saving FastFold automatic assembly. Each product is made from 100% recycled board. Purchase any Bankers Box and have a chance at winning enough tree planting to offset it for a whole year, visit www.bankersbox.com/tree