This can happen for a few different reasons:
Incorrect direction: Boys can often pee over the top of the absorbent pad. Ensure you are using them in the correct direction.
Not washed before used: UpAiry Underwear should be washed 2-3 times before use to prepare the fabric to absorb liquid.
Improper fitment: This is the #1 reason. Ensure there are no gaps between the legs and waist.
Multiple accidents: If your toddler has multiple accidents in the training pants, the absorbent layer may not be able to absorb all the liquid.
The pee wasn't absorbed: For UpAiry Underwear to be leak proof, the liquid needs to come in contact with the leak proof layers (see picture above). If the liquid goes through the top part of the Training Pants, it will go through.
If this is consistently an issue, reach out to us! We want to make sure you are happy with out product!