htaccess - Remove trailing forward slash except for

I have the following in htaccess to remove trailing slashes:

#RewriteCond %{HTTP_HOST} !^\.example\.com$ [NC]
#RewriteRule ^(.+)/$ http://%{HTTP_HOST}/$1 [R=301,L]

This works great, but I now need to add an exception to that rule. I have a folder (lets call it 'myfolder') that needs a trailing slash. Is it possible to ammend the above condition to allow this?

If it is a real directory you could go with..

RewriteCond %{REQUEST_FILENAME} !-d

...otherwise you could go with...

RewriteCond %{REQUEST_FILENAME} !=myfolder

Thanks Cags,

In the end I went with this:
RewriteCond %{HTTP_HOST} !^\.example\.com$ [NC]
RewriteCond %{REQUEST_URI} !^/myfolder/$
RewriteRule ^(.+)/$ http://%{HTTP_HOST}/$1 [R=301,L]