Neoprene boots don't "breathe", so unless you work hard to get rid of it, moisture will escape slowly. Bacteria and other microbes in the water and on your feet can create odors in wet environments. Next, I'll show you how to clean and dry water shoes to prevent odors.
To prevent shoe odor, be sure to rinse your shoes with clean water after each outing. For faster drying, tuck a rag, towel, or newspaper inside the shoe to absorb moisture. To finish drying, place your shoes in the sun or dry them with a hairdryer or boot dryer.
This could be all you need to do to prevent odors. If odors do occur, we've got you covered. Wetsuit and drysuit shampoos contain ingredients that neutralize chlorine, which is a great way to protect the neoprene from damage when you use it in the pool.