Ensure correct measurements! The product will not work if the seal is not snug around the arm.
1. Measure the circumference of your arm at 2 inches above the cast.
2. Measure the length from your fingertips to 2 inches above the cast or wound. As long as the length of the cast cover is longer than your measurement, you are good to go! Any excess material in length will be shrunken down with the vacuum seal.
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