I've found this product prevents my stethoscope from tangling as it does when in my pocket.
Perhaps manufactured in steel would add to the resilience of the product.

Definitely recommend this product. It allows your hands to remain free, and your stethoscope remains out-of-the-way without being far when needed. The clip-on to the belt is tight so there's no need to worry that the holder will "drop off". The stethoscope looks neat on you with the holder (rather than your stethoscope being a messy swirl of cords) and as long as you're not bumping the holder or doing hand-stands, your stethoscope is loose but secured.