Aluminum.
aluminum
SCUBA means self contained breathing apparatus. Most scuba divers wear neoprene hoods and these come in a variety of colours. I think you are talking about standard dress or hard hat diving where the diver has a big spherical helmet and lead boots. These divers are not SCUBA as they have air pumped from the surface. These helmets look brown because they are made of brass and copper which turns brown when it oxidises. If you polished it up, it would look gold in colour.
Absolutely! They've been making scuba regulators for nearly 60 years. The best made. Period!
Yes, Freestyle makes water proof watches since they have a range of watches for scuba diving.
Helmets are mostly made from polystyrene
The company is Italian but the helmets are made all over the world.
Most scuba tanks are filled with simple purified air. However, some are filled with oxygen enriched air called 'nitrox' or (less commonly) a blend of helium, oxygen and nitrogen called 'trimix' or (even less commonly) helitrox or heliox.
Scuba diving tanks or cylinders are usually made of steel or aluminium. You can also get light weight high pressure cylinders made out of thin aluminium with carbon fibre on the top. These are often used by fire fighters.
Roman helmets were made of bronze or iron.
No there is not any helmets made out of reyceld gargabe!
There are no helmets made specifically for Mining, but normal Helmets do exist in Minecraft.