LILLYDOO Baby Swim Diapers
- Diaper
- 40 count
- 40
- Polyethylene
A 40 count pack of size small swim diapers for babies roughly 13 to 24 pounds, sized as a running supply for regular pool or beach trips.
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How it ranks among the 213 diapers we track
3.9★ across 33 Amazon ratings, Bayesian-smoothed toward the category average.
33 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
100+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 213 diapers we track - how the scorecard works · full diapers data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
LILLYDOO's swim diapers in size small fit babies from about 13 to 24 pounds, sold as a 40 count half-monthly pack made from polyethylene. Designed for pool or beach use rather than as an everyday absorbent diaper.
Swim diapers like this one are built to contain solid waste in the water rather than absorb urine the way a regular diaper does, since polyethylene does not hold liquid the way an absorbent core does. The half-monthly count of 40 works as a running supply for regular pool visits rather than a single outing, and the size small weight range covers about 13 to 24 pounds.
- Size small, fits about 13-24 lbs
- 40 count, half-monthly supply
- Polyethylene material
- 3.9 stars from 33 ratings, 100+ bought in the past month
Who it's for
Fits parents of a baby between about 13 and 24 pounds who need swim diapers for the pool or beach on a regular basis, given the 40 count supply. Not meant to replace a regular absorbent diaper for everyday wear.
Strengths and trade-offs
Drawn from this product's published specifications.
- 40 count covers regular pool or beach visits
- Sized specifically for the 13 to 24 pound range
- Not an absorbent diaper for everyday wear
- No specifics given on fit or leak guards
Performance notes
Polyethylene contains solid waste in the water rather than absorbing liquid, which is the standard mechanism for swim diapers. The 40 count half-monthly supply is sized for regular use rather than a single day trip.
Specifications
| Brand | LILLYDOO |
|---|---|
| Capacity | 40 count |
| Pack Count | 40 |
| Material | Polyethylene |
| Item Weight | 1.96 pounds |
| Age Range | Toddler |
Other LILLYDOO diapers
How it compares
This product against the closest alternatives we track in diapers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| LILLYDOO Baby Swim DiapersThis product | 3.9 / 5 | 33 | 3.6 / 5 |
| Pampers 37000799825 DiaperPAMPERS | 4.8 / 5 | 129,600 | 4.7 / 5 |
| Huggies 10036000496946 DiaperHUGGIES | 4.8 / 5 | 87,800 | 4.7 / 5 |
| Diaper 00073800023293Diaper | 4.6 / 5 | 43,456 | 4.6 / 5 |
| Hiccapop HP-WWCL DiaperHiccapop | 4.5 / 5 | 23,602 | 4.5 / 5 |
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Questions about the LILLYDOO diapers
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What weight range do LILLYDOO size small swim diapers fit?
About 13 to 24 pounds.
How many swim diapers come in the LILLYDOO pack?
40, sold as a half-monthly supply.
Are LILLYDOO swim diapers absorbent like regular diapers?
No, they are made from polyethylene to contain solid waste in water rather than absorb liquid.