Yep, there is some excellent Mil spec gear around. I'm currently looking for a UK supplier for the Sealline ILBE dry Sacks.

http://www.amazon.com/ILBE-Sack-65L-Olive-Retail/dp/B002PWFSK8

For some reason the newer FILBE Bergen doesn't appear to come with a dry compression sack though.

There are lighter Bergens available with larger capacities such as the Mil spec offerings from Norrona, Berghaus, Karrimor, Web Tex and Lowe Alpine but for Military Training purposes used in developing Hill Fitness these do require the addition of multiple LSBT's



But I can't seem to find a NSN number for LSBT (Load Simulator Brick Training)...