The jumpsuit also gives your protection especially when you are landing. A lot of people do not land feet first once they hit the ground. Even if they do, the wind could pull them down and you could get scratches or cuts until you are able to take the parachute off.
4. When do you deploy the parachute? That is a very good question and to do that, you will need to have an altimeter as part of your gear. This device will tell you how are you are from the ground and is very useful especially when you decide to skydive at night.
5. You will also need protective gear like a helmet and some protective padding. To be sure, you can also get a spinal protector which will protect your spinal cord should you accidentally fall on your back when you hit the ground.
You must always check your gear regularly before you get on the plane and before you jump. If there is a problem, you could be plunging to your death which is why this is also inspected by one of your companions or the instructor.