This all natural magic beeswax by YKRA will wax and waterproof your cotton canvas bag from the elements. Its very easy and you can use on other cotton bags.
How to waterproof your backpack:
1. Gently rub the wax on the outer canvas parts, making sure that it is evenly distributed
2. Use a hair dryer on mild setting to warm up the wax. Letting the canvas soak it up!
3. Test to make sure you have applied enough wax, and the water runs off. If not, repeat step 1 and 2!