The low profile design is a definite improvement over it’s predecessor. I also like the low maintenance glasslike bladder material. The one issue that I have had with both this product and its predecessor is the tenancy for the bladder to crimp during use at each side seam about two thirds of the way down from the top. This eventually develops into a material failure and a leak. To counter this tenancy I have reinforced the side seams with duct tape.
Reply by SOURCE Hi Colin, thanks for the feedback, we'll forward it also to our developers. The bladder should be attached at the top, that way making sure it does not fold and water is free to flow all the way.
using the widepack LP low profile , very happy with product , easy to clean, does not leak, does keep shape. By the way web site easy to use , using Source hydration packs are vey good , have used the other 3 major mfg. hydration packs and was not happy with them at all.