Posey Friction Buckle Jacket
          Friction Buckle Jacket  (Size small - red collar)
           
           
          The buckles of a Posey friction buckle jacket are more difficult to fasten than are the buckles of a roller buckle jacket, but this means that they are also more secure.  It is quite difficult or  unfasten to even loosenthe buckles without external aid.  However one can undo the buckles by rubbing up against an outside corner or a door opening.  To make the jacket escape proof  one should double the buckles as shown below.
          Normal method for fastening buckle.
          Double back method for fastening buckle.

          Buckled in this manner the friction buckles are very difficult to undo.  One draw back is that the buckles are now quite thick and the jacket is rather uncomfortable for sleeping.

           
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