A Femidom a disposbale, odourless sheath designed to protect you by lining the inside of the vagina or anus (if used for anal sex the inner ring must be removed before it is inserted). It is not latex and therefore can be used by people allergic to latex condoms. It can be inserted a few hours before sex and is pre-lubricated. Unisex sells femidoms in the drop-in for 75p each.