30 Sivan 5772
One of the things that impressed those medical folks yesterday was that the cast was intact, not moldy or soft from bath/shower water. The usual advice is to wrap it in a disposable plastic shopping bag and to hope for the best when the person bathes. That rarely works 100%, as I know from personal experience, and from looking at lots of medical records and chatting with people who've endured fractures.
So I came up with an almost foolproof system to protect the integrity of the casting material
and the body parts inside it.

Here's how I've protected the cast to keep it dry. See what this technique does for you!
Wrap a thin cotton towel around an area just above the affected body part - or have someone wrap the towel for you. Tuck in the end and make sure the towel is snug.
THEN encase the area in a plastic bag that you fasten shut by A) Squeezing the ends into "loops" to be tied together shoelace style or B) Twist the gathered plastic into a tight "rope" and insert it into plastic bag material against your skin. It's the same technique as twisting a towel over wet hair.
You now have absorbent material to soak up accidental "leaks" into the bag. A 2-pronged system for keeping your casted body part(s) dry, it's quite effective.
Okay medical specialists and patients, what do you think of that?

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Face Your Medical Problems with Dignity.
Face Your Future with Optimism.
And a dry cast ;^ D
