Originally Posted by chaadster

Latex tubes have reduced rolling resistance, are lighter, and more resistant to snakebite (i.e. pinch) flats. Downside is that they leak down faster and are expensive.

Panaracer make a tube (in their own factory) called the R Air that's a superlight blend of latex and butyl, supposedly offering the benefits of both materials. It can be patched with a regular butyl patch kit. Cost is about $14 per tube, but it's probably the best performing, all around tube you can buy.