not all bad. if you know what your doing with them you can still have a bonet that isnt going to get wrecked.
every so oftern take it off wash the inside and wipe down the bonnet tostop the bonnet geting damaged when it sweats, make sure its dry, dont go cheep instead get one that fits properly, when it rains afterwards wipe the bonet down and make dry the bra as much as you can, make sure the bonnet is spotless before you put it on so no dirt is trapped underneeth ect. i know people who have ran them for a while and there bonnet is fine.