Downproof Tester, To determine the downproof capability of fabric used for downgarmet, quilt etc, which are full with down, feather and fibers.

Take an agreed size specimen from the fabric to be tested to sew a pocket at specified size , fill with a certain weight of down, feathers or a mixture of both, then sew the fabric up to be a testing bag. Clamp the both sides of the bag in the holder. After test to determine the downproof ability of the fabric by calculating the number of down and feathers through the fabric