Yes, SIM shorts are intended to be worn in the pool. Each model has been treated with an SCS Nano Coating to increase longevity.
We recommend rinsing your SIM shorts with fresh water after every swim and hang to dry to help remove pool chemicals that can be damaging. It's also a good idea to clean your shorts with a wetsuit shampoo from time to time.
Please note that repeated exposure to chlorine and other chemicals will eventually break down the neoprene. You may need to replace your SIM shorts every one to two years.