Designed for marine environments, these chests are made of fiberglass and have stainless steel hardware, so no parts will rust or corrode even when exposed to salt water. The fiberglass build also insulates what’s inside from electricity and heat. Leave them outside without worrying about damage--a UV coating protects these chests from sun damage. Gas springs help you open and close the lid smoothly. Use padlocks (not included) to secure stored items.