Yes all Pampers Swaddlers diapers do have the wetness indicator line on them.
The wetness indicator line is a yellow line that is on the front of all Pampers Swaddlers diapers that changes color when wet.
When the yellow line on the pampers swaddlers diapers change color then it means it's time to change the diaper.
The yellow line does help to know when it's time to change the diaper.
However as long as you're changing your babies diaper every 2 hours or 3 hour when the diaper gets wet enough then you're doing the right thing.
Pampers Swaddlers diapers and other diapers can absorb quite a bit of urine so you may not need to change the diaper until 2 to 3 hours depending on the age of your baby and how much they wet.