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Aside from the expansion capabilities with our Piggyback System (click here), your EMR bag has a wide latitude for expansion and compression. Either way, you still get rock solid performance.
 
Expansion.
  

The Snow Collar  is an extendible tube that adds volume to your pack bag. Top hood extends with it to provide compression.
available only on the EMR

You can also throw gear on the top of your ruck (with or without the Snow Collar extended) and cinch it down with the Top Hood.
     
Compression.

  Compression Straps.  Your EMR/MMR have ample straps to let you shrink volume from the top, the bottom and the sides to fit your load. You get 8 total - 3 on each side and 2 on the bottom compartment.
You also get vertical compression from the Top Hood straps.
These straps also center and stabilize the load.
No slop, no noise.
     
  The Utility Strap (optional) can add compression ANYWHERE you need it on our EMR/MMR. Simply clip it on and cinch down. We find it is particularly useful for extra compression of the bottom (sleeping bag) compartment corners. Click here for more information on the Utility Strap.