Very disappointed in the manner that this item is promoted. I purchased the 55 lbs model thinking that the 5 lbs adaptive filler bags were included. The description, at least to me, does not make it clear. I was further disappointed when I received the KB with a large filler bag which was rated at 30lbs, meaning I would have to make another purchase so I can use the KB at the weight they are rated, 55 lbs. This is not my first purchase of Brute Force gear. I have three different sized sandbags, the older style vest, and an older version KB. My biggest disappointment is that in those purchases I was able to use them right out of the box once I filled the fillers that came with the items, unlike this purchase. Brute Force should consider a number to actually speak to someone in customer service instead of email. Trevor Tom, BFHQ Manager, never seemed to ever understand what the issue was, thinking there was confusion between purchasing the weighted version as opposed to the empty version. That and the price difference between the two versions was probably the clearest thing on the website. Returning on principle.