For only $5-10, you can buy (or make) wax bars that waterproof (weatherproof if you want to be real technical) all your clothing or fabric gear.  In Europe, many clothing companies like Fjallraven use wax to waterproof their fabric.  Fjallraven’s product is called Greenland Wax.  Watch how well this cheap $5 bar waterproofs my pants.

Buy a bar of Fjallraven Greenland Wax here to test it out.

OR

Try to make your own Greenland Wax by watching this DIY video.