It is IMPORTANT to follow sizing instructions. Vacuum seal will not work unless the opening of the cover fits tight around the skin above the cast.
Circumference: 13" & Up (33cm+)
Length: 23.5" (60 cm),If the cover is too long simply bunch up the extra material and pump out all the air. The extra latex will shrink down and conform to the shape of the users arm removing all extra length.
Instructions - Slip it on: Stretch the Dry Pro over the arm cast (sometimes easier to put a sock/stocking on first). Make the vacuum seal - Pump out the air using the removable hand pump that is included. Take it off - Let the air back in by lifting the Dry Pro from the skin, releasing the vacuum seal and sliding it off
Watch the video at the top for sizing help
WARNING - Do not use if unable to create a snug vacuum seal.