Recently there has been a lot of discussion over whether closed system breast pumps are really better than open system breast pumps. (breastpumpcomparisons.com)
This is super important because closed system breast pumps have a barrier between your milk and the pump motor and tubing, preventing moisture from entering the tubing and pump motor. (pumpables.co)
Closed system breast pumps prevent all this gross from happening, making them safe and sanitary to use. (pumpables.co)