Originally Posted by
Low Roller
.... if you're outdoors in the evening, long pants may be a good idea to keep the mosquitoes off...
You won't really find mosquitoes in Havana, but maybe a couple just in some of the beach towns with mangrove swamps nearby. The government sprays pretty aggressively.
If there were mosquitoes (which there are generally not), note that many buildings don't have screens or windows that close, often just shutters.