Alps, Alps - Mossy Falls Pack All Internal Frame Backpacks >>> Internal Frame Backpacks by Alps More details and ordering info. The Mossy Falls pack is a solid internal frame for the backpacking enthusiast. At 4000 cubic inches it can haul everything you need for your next weekend outing. User input on Alps - Mossy Falls Pack by Alps: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines