Heated apparel is waterproof in the sense that water does not damage the product or prevent it from functioning. However, the battery should not be connected to the garment if the garment is submerged. If the battery connector gets wet, wipe dry before connecting to the battery.
The heated apparel is not water resistant, it does not repel water. The product will still function if it becomes damp. The battery and battery connector should remain dry at all times when the product is in operation.
If the battery gets wet while the product is in operation, it could cause electric shock or damage due to short. Water damage is not covered under warranty.