This is the one I use. You put your valubles in it, draw the steel cable tight by wrapping it around the bedframe, headboard, or any other fairly secure object, and lock it. Also a good idea to tuck it out of sight, under a pillow or the matress. It is by no means fool proof, a theif could still find it and break into it with out TOO much effort. But, they would probably not want to spend much time in the room doing so and just move on. There is stainless steel mesh enclosed in the nylon bag.

http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1