In the main tripods are manufactured from ALUMINIUM or CARBON FIBRE. Many years ago some were made from WOOD but not nowadays, but saying that wood is sometimes used for telescopes tripods and many people prefer them.Both Aluminium and Carbon Fibre have disadvantages and advantages, it depends on your requirements. If price is the most important criteria the aluminium is the way to go. Also aluminium is STRONG and STURDY. Down side is that aluminium tripods are heavier that Carbon Fibre ones, they do not absorb shock as well as Carbon Fibre ones and get very cold in winter.Carbon fibre tripods are more expensive than Aluminium ones but are much lighter, and they absorb shock much better.There are many things to consider when thinking about purchasing a tripod. What do you require your tripod for, will it be mainly Studio work or will you require it for location filming. If you are climbing mountains with it on your back then weight is a major factor. What is the load capacity, again usually heavier cameras are used for Studio work rather than location filming. What Maximum height do you require? If you film wildlife particularly insects its very important to have a tripod that gets as low to the ground as possible. Consider the adjustment features and speed of setting up and taking down. How sturdy is the tripod built, is the centre column removable, is there a spirit level, if so do you need this facility. If using an aluminium tripod is the aluminium tube rolled or extended.In conclusion its very important to maintain and look after your tripod. keep it clean, regularly inspect all clamps and tubes. Where ever possible keep your tripod protected in a suitable specific bag or case.