Well, there are several Tipps I can give ypu based on my experience and research
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Healthy chastity for men
THE CAGE / BELT
-The tube souldn't be longer than the top of the penis when wearing it. The base ring also adds length. Better smaller then bigger.
The device must not habe any sharp edges
The cheap devices for 10€ /$9 are nothing I would recommend, because they often don't have a fullly round base rimg and just two thin stripes that are connected with another stripe. This construction is impossible to wear. The only thing these cages with said base rimg are good for is measuring your sizes
The base ring is to be as small as possible but big enough so the testicles won't change their colour or you'll feel it uncomfortable to wear the device
Many plastics are being prodoced in China with amounts of cancer-casing and pptency-damiging ingrediences which are above the allowed percentages of our conutries - they just don't get chekcs ehen being imported
Cleanig
-You should be cleaning the cage every few weeks /every month (depending on the cage; plastic needs to be cleaned oftener)
it is highly recommended to have a full erection every month (at least every few months) to prevent your vessels,etc. from hardening or being damaged otherwise
no the penis doesn't really shrink, it's just an advanced shrinking effect (like the cold water effect)
Try to spread the skin of the testicles on the whoöe length of the base ring so your skin gets less irritated
you will need about a weel to get used to the device if you're new to being locked. Not only for the fit, but also to be able to sleep good at night while being caged.
Male sure you have a keyholder who doesn't become weak after some time and who cares about your health