Inmates at Rikers Island are typically provided with a standard uniform consisting of blue or gray jumpsuits, depending on their classification and housing unit. They are generally not allowed to wear personal clothing, but they may have access to certain items such as underwear, socks, and shoes that meet specific guidelines. Additionally, inmates can receive approved clothing items from family or friends, but these must comply with the facility's regulations. Overall, the clothing is designed to ensure safety, security, and uniformity among the inmate population.
That would depend upon what kind of facility they were inmates of; asylum inmates had different facilities from criminal inmates.
Basic, but adequate.
The same kind of clothes you wear here. And there traditional clothes.
To find out who is visiting him, you could always try to check his text messages or phone calls. You can also try to listen in on his phone calls. Try getting on the computer to see what kind of e-mails he's getting.
The same kind of clothes anyone wears, clothes.
High security
(in the US) Inmates sentenced to deat are held in a special area of the prison complex and segregated from the general population.
What kind of clothes do Filipino people wear
Inmates that were risks to other prisons
Clothes
No clothes
If this is a deserted Island this is strictly a practical consideration. If this is an Arctic Island you will need heavy Arctic clothing If this is a tropical Island you will need clothing to protect you from insects, damage from the environment depending on what you need to do to survive. Shoes for example. Of course a Desert island would be different ;)