I like everything about this product....except one feature - - that is missing! Compared to other brands and total versatility, this pack has no convenient way - or patches/loops - to secure (externally) a sleeping bag! Whaaattt?? Mine is synthetic and will not easily compact in the main compartment, so I have to figure an elaborate way to lash the bag to the top or bottom - without secure ways to do that. However...an amazing design in every other way!