Holds up to 25 lbs of cat Breathable & sturdy mesh windows on all three sides! Water reservoir pocket (Does not come with water bladder) Zippered pocket with 3 inside pockets and key hook Two Flexible side pockets for water bottles and supplies Two clips inside to attach harnesses or leashes (yes, you can use for 2 cats!) Adjustable waist strap (extra long) Adjustable chest strap, both length and height Adjustable shoulder straps Zipper clips on all zippers Can be used as a backpack or "traditional" carrier Detachable shoulder strap Removable mat folds to fit both ways Entire bag folds up to pack flat and for easy storage