California waters do get cold in the winters, so carrying a quality hood will keep you warm when temperatures drop. We lose most of our heat from our heads, meaning that without a hood, even the thickest of wetsuits may not be enough. Dive longer and stay comfortable with one of these high quality options. An added bonus of diving with a hood is you know you won't surface with half of the kelp forest tangled in your hair, which no one likes. Except Ariel, but we all know she's a little crazy. Trade fins for legs? Uh, no thanks bro.