A women's jail is providing special outfits for Muslims when sniffer dogs check them.
The overalls are given to inmates who believe the animals are unclean.
Visitors also get to wear the special gear as dogs sniff for drugs at HMP Prison Send in Surrey.
A memo to warders says the kit then has to be washed separately. But some staff say the "special treatment" causes operational difficulties.
The clothing is also being made available to Muslim visitors to the jail.