Exotic Condom Flavors

Polyisoprene is a synthetic version of natural rubber latex. While significantly more expensive, it has the advantages of latex (such as being softer and more elastic than polyurethane condoms) without the protein which is responsible for latex allergies.
Lambskin
Condoms made from sheep intestines, labeled "lambskin", are also available, although they have been clinically shown not to necessarily keep out STDs compared to latex because of pores in the material, which are thought to be large enough to allow infectious agents to pass through; sperm is still blocked. Lambskin provides more sensation and are less allergenic than latex, but because of their comparatively less-safe nature, other hypoallergenic materials such as polyurethane are recommended for latex-allergic users and/or partners. Lambskin condoms are also significantly more expensive than other types, similar to polyurethane's comparative expense to latex.