BTW Where on the bags are you comparing the material as there may be inherent differences in the construction of the 256 and 257 ? It would be better to compare new and old 256 bags. FWIW - I have just done a quick finger test on my 256 and 257 bags and they feel about the same thickness. Both bags have 'might as well have the best' tags.
9/25/14 at 1:47pm