They are made of an extremely durable plastic. The StarCave has two large doors, one on each end. The tension achieved by the network of hubs and poles keeps the film stretched tight in the wind, preventing tear through wind vibration. The StarCave's doors have been designed to bypass the need for zippers. We use hook closures.
Zippers are notorious for breaking after a short working life.
This means that when the doors are open, you have complete access for rolling wheeled carts in and out. The StarCave comes complete with clips and connectors attached to covering, poles, stakes, and instruction manual that details floors, site selection, anchoring, and winterizing. Setting up a Shelter Systems' Dome. To make your dome more comfortable. Floors, liners and more.