A: It was on the box but I have forgotten. Sorry
A: Yes, it can go in a shower. That's where I'm using mine now. Just check the dimensions to be sure it will fit your floor.
A: Yes, it has non slip feet so works in the shower, mine is in outdoor shower and is always wet and sandy but holds up great. If you are in reqular shower it will get soap buildup that will need to be cleaned periodically.
A: While bamboo holds up to moisture much better than almost all other woods, it is still wood. Over time it will begin to fail. The climate would play a significant factor also. Dry climates would allow the mat to dry quicker, while high humidity would not help your cause. I would not use it in a standard shower but if you have a walk in and you clean it often I could see it lasting a long while. There are small 1/2 inch rubber feet so it should not shift on most surfaces. No guarantees though. Hope this helps
A: Yes, this product can be used in the shower.