dont have compression straps, but theres a bungee on the back thats seems to be attached at random points, ive managed to get hold of the 4 ltr, when its on you pull the bungee and it tightens the pack, acts like a compression strap. Tired bag this morning with a bladder in, must admit it wobbled a bit, not sure if pack could do with something more though to compress pack a bit more, but aprt from that and price i like it, whether its worth the extra money compared to a bp or karimor raid though may be a personal choice