Some brands use sprays and finishes in their fabrics to control smell, but these chemicals contain heavy metals we are just not sure about. Until the anti-microbial technology has a natural alternative that's seriously non-toxic, we're going to sit that option out. Fresh period blood doesn’t have a scent that carries. You might smell it on yourself, but think about it - have you ever smelt somebody else’s blood? Also, we’re human. Smells are OK.