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Diaper liners! Our little guy started peeing through diapers around 16 months so we went up a size. Still blew right through them. Adding these liners worked great. The phase didn’t last too long - maybe a few months. The diapers in the morning were quite heavy, but the clothes were dry!
Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://smile.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_i_3CDPXKPYMS5CB139CCWR
Us too!! OP, here’s the link: Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://smile.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_i_DS9KQQDMFJ2XBWZBZ4VC?_encoding=UTF8&psc=1
I’ve found it’s most effective to fold in half and put only in the front of the diaper (for obvious reasons…).
We had a similar problem, though not quite as bad. My 3yo son started peeing through everything at night when he was about 6mo and hasn’t stopped yet. We did the same as you going up a size for nighttime, though we have always used pampers.
We finally went to the overnights and it helped a little, but he still peed through to his mattress pad. Someone told us of Sposie Pads that are for extra absorbency. I know that you are having blowout issues, but these Sposie Pads may help absorb some of the liquid to prevent it from blowing all the way out. We had to go to a size higher for the overnights to accommodate the Sposie Pads.
I swear by these to keep my little guy dry. Booster pads are awesome!
Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_fabc_C8AJTXXM0E2HQK75CDK7?_encoding=UTF8&psc=1
In addition to the pamper overnights we also used these booster pads on the overnights for my boy for some added protection:
Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_fabc_CA4J2KFN0SZ4PTMT07FB?_encoding=UTF8&psc=1
I do the Pampers overnight + these inserts that give it a little extra boost. My girl has a massive bladder so she can still overwhelm this combo lol, but it’s rare.
Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_fabc_VXE9KBYK062XD0AKD002?_encoding=UTF8&psc=1
Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_fabc_XM4PVDCH8EKNSGJQZ0Z0?_encoding=UTF8&psc=1
I saw these recently. It might help
Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_api_glt_fabc_BPNNRND0ACQAFMZ5F4SC?_encoding=UTF8&psc=1
We buy these and place it more towards the front of his diaper.
We had this problem with my second son, and the only thing that worked was to put a kind of "booster" inside the diaper to increase the absorbance. I don't remember exactly what they were called, but it is similar to another poster's suggestion of using a maxi pad.
I looked them up: Sposie Overnight Diaper Booster Pads, 90 ct, No Adhesive for Easy Repositioning, Helps Stops Nighttime Leaks, Fits Diaper Sizes 4-6 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_apan_glt_fabc_7KQHPK3P2B7HG96634SE
These worked like a charm for us.
I second the Pampers, but the baby-dry line over the swaddlers. We went through two periods where ours would still leak a little bit out of those, so https://www.amazon.com/gp/product/B0083973FK were a huge help. It was luckily just a couple weeks here and there.
Same thing was happening to our LO. We use regular Pampers diapers and then we put this booster pad in it. He hasn't had a leak since!
We use these diaper pads inside an Up&Up overnight diaper. Kid used to wake up with wet jammies/sheets every morning; now the pad+diaper contains everything. I like these particular pads because they don't have adhesive or a plastic backing, so when the pad is full, the pee just soaks straight through to the actual diaper itself.
I tried pull-ups when my son started soaking through at night b/c we were already in size 6 diapers, but I found them to be much less absorbent. I think they're really designed for kids who mostly make it to the bathroom, not for those who sleep straight through while they pee all night long. Diaper with liner worked for us. (We use Bambo during the day but like the Target nighttime diapers.)
I hope I'm not giving terrible advice by advocating sticking to diapers at night for a while longer. I haven't yet explored the wonders of potty training with my son, but my understanding is that you don't have to do days and nights at the same time. And, in fact, that many kids don't stay dry at night for a long time after they're daytime trained.
(If it were me, I'd have him pee last thing before bed but then diaper him back up. When he starts waking himself at night to go to the bathroom instead of sleeping through or starts waking up dry at least some of the time is when I would switch to pull-ups.)
My son started peeing through his overnight, sized up diaper about 9 months ago (2 years and some months). We use these booster pads that we get on Amazon with his diaper and his pajamas stay dry.
Select Kids Booster Pads Diaper Doubler, 90 count, 3 Packs of 30 https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_cp_awd_K2FEwbK2YZG6N
We use the inserts with regular diapers like these, https://www.amazon.com/Overnight-Alternative-Nighttime-Prevents-Protection/dp/B0083973FK/. Tried night time ones too, and they were not enough. Similar age as your son.
The little girl (oh my god she’s 9) I used to nanny had this same problem. It mostly resolved after her parents started using a product like this
We use Pampers 360 at night. I put him on the potty to pee before bed and that helps. Sometimes I use Sposie Overnight Diaper Booster Pads with em too. https://www.amazon.com/dp/B0083973FK/ref=cm_sw_r_apan_glt_fabc_DM5NHRMD9B71KW1SR378
Amazon has extra pads with 12oz absorbency that you can stick into diapers. That's what worked for us 6m-2.5 years.
Spoozie Booster Pads
Haha. That does sound like a wild ride! They have different sizes both with and without an adhesive strip.