Damselfish
Contributor
Something like a neoprene hood/cap does limit water flow, which in my experience helps perms and colors to last longer. It won't stop hair from getting wet, but should mostly keep it from moving around which I think helps prevent tangling - my theory is if it's not moving it's not tangling? I'd think also wetting hair first with fresh water couldn't hurt. Whether conditioner under a hood would help I dunno.