If a hood type is too big to practically carry all the time but want something that will provide some protection, how about a face mask?

http://www.amazon.com/Kimberly-Clark-Childs-Stretchable-Earloops-Latex/dp/B001RRRVMU

No affiliation.

Jeanette Isabelle
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I'm not sure whose twisted idea it was to put hundreds of adolescents in underfunded schools run by people whose dreams were crushed years ago, but I admire the sadism. -- Wednesday Adams, Wednesday