Guitar straps come in two different types. Leather, and nylon. Guitar straps are the best way to stand up whilst playing. Nylon is the most common type, and comes in lots of different stylesThere are also leather straps, which last longer and have a different feel. It's also worthwhile looking at straplocks, which use a mechanical system to hard lock the strap to the instrument. These are really useful incase you have issues where your strap falls off.