Yes, you can swim while wearing a type 2 PFD. In fact, many type 2 PFDs are designed specifically for swimming. However, there are a few things to keep in mind when doing so. First, make sure that your PFD is securely fastened and will not come off while you are swimming. Second, be aware that you may float higher in the water than you are used to and that your movement may be more restricted than usual. Finally, remember that your PFD is there to protect you in case of an emergency and should not be used as a toy or flotation device. If you have any concerns about swimming with a PFD, please consult a lifeguard or other qualified individual for guidance.