Yes, you sure can wash your SbJL bag! I prewash, tumble dry and iron every piece of fabric that comes in to SbJL so it has been preshrunk prior to making a bag out of it and sending it out to you so there is no fear of weird and wonky shrinkage when it's time for it to have a bath.
To wash your bag, please remove the zipper pull (if you can't get it to come off, that's okay, but it might beat up the crystals a bit), then wash it on the delicate setting (if you have one) with cold water, using a washing solution that does not have sulfates (no Tide or anything with 'brighteners') at-casinos.com. Once it's nice and clean, take it out of the washer, re-form it into it's original shape and let it air dry. You can dry it in the dryer on low, but it won't retain it's crisp 'like new' look once it's been tumble dried.