Newb question. I only have two filters (77 & 72mm), both CPLs and was thinking about getting a small wallet to keep them handy in my bag, or possibly on my belt for easy access. The cases that can attach to your belt have a top flap held by velcro, but the sides are exposed and the tops of the filters can be seen. I would think that dust. lint could be a problem. Maybe I am being too anal. The one I was looking at is http://www.amazon.com …PAVI2/ref=pd_rhf_cr_p_t_2
Will they stay clean in these open sided cases?