Complex sentence: There are also similar tight-fitting open-faced hoods which are used for sex or cosplay only, which are much safer to use because they do not obstruct the wearer's breathing.
Split into simpler sentences: There are also similar tight-fitting open-faced hoods which, as mentioned above, are less restrictive and thus may also be used for sex or cosplay. Open-faced hoods are also much safer to use because they do not obstruct the wearer's breathing.