True, most ponchos are around 50x90. The US Military poncho is 66x80. It might be better if it was a bit longer, I have never noticed it being too short for any reason. It is the width that I notice, the military poncho will cover your arms and hands when worn and when rigged as a lean-to it is a decent width. Rig 2 together to for an "A" frame shelter and it is very comfortable. Lots of head room.
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No, I am not Bear Grylls, but I stayed at a Holiday Inn Express last night and Bear was there too!