The shells of today's hard camera cases are typically made of industrial-grade polypropylene blends. This stuff is tough enough to withstand being dropped down a flight of stairs or a small hillside. Most of them will even support your body weight if you should want to stand or sit on them. And despite their strength and durability, the best options don't weigh a ton. The interior components vary across brands–and even within brands–but typically are a foam material that offers shock absorption, cushioning, and organization.