Nasty, blood sucking flies
If you wear shorts when the hot, humid months arrive and the breeze is off the land that brings those damn biting flies that treat your legs like they were spare ribs- carry a pair of lightweight nylon slip on pants. They only weigh 2ozs., dry fast and fold into a pocket and most of the time will protect your legs. It will turn a miserable morning into a tolerable one. I have seen grown men run off the beach in agony from these flies, leaving an area void, except for myself. Hey, ya know what, I like plugging solo, forget about bringing those pants, just wear shorts.