The t:slim X2 insulin pump is watertight to a depth of 3 feet (0.91 meters) for up to 30 minutes (IP27 rating), but it is not waterproof. Your pump should not be worn while swimming, scuba diving, surfing, or during any other activities that could submerge the pump for an extended period of time. Your pump should not be worn in hot tubs, whirlpools, or saunas.
NOTE: Watertight and waterproof are not the same. Tandem pumps are watertight.