Principle No 2 of 23 Principles: Get the Gear You Need. Getting the right gear means getting the tools, equipment, and technology needed to manage your thoughts, feelings, and actions.
Getting the right gear means getting the tools, equipment, and technology needed to manage your thoughts, feelings, and behaviors. Having the right gear helps you overcome obstacles that you would only overcome with it. The more you advance, the more advanced equipment you will need to perform faster in more challenging conditions without hurting yourself or others falling or failing.

Mountain Biking Gear Checklist
Here's a helpful list of 20 things you need to get to have a fun, comfortable and safe ride.