Students must use upper- and lower-body strength to traverse upside-down from one end of structure to the other. And because climbers are only inches off the ground, it's safer than vertical climbing challenges. (Use at least 2" / 5 cm thick mats. See Mats section.) Each unit handles students up to 250 lb (113.50 kg), but is light enough for 2 people to move. Steel/aluminum frame with powder-coat finish. Some assembly required. For middle elementary and up. 10'L x 5'W x 32"H; 125 lb (3.05 m x 1.5 m x 81 cm; 56.75 kg). Truck delivery.