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Thirsties Swim Diaper - Whales

Thirsties Swim Diapers are a trimmed-up beach and pool-ready version of our Thirsties popular Duo Wrap. This swim diaper meets the requirements of most public pools.

With the adjustable rise, you will only need two sizes from birth to average potty training age/weight. For those who need a larger option for continued diapering, size three is available to fit most babies from 35-55+ lbs.

Thirsties designed this trim-cut diaper with a mesh interior and hip snaps to keep baby splashing in comfort while double leg gussets and waterproof exterior shell keep you and everyone else swimming worry-free!

Sizing Chart:




Size One

6-18 lbs (3-8 kg)

0-9 months

Size Two

18-35+ lbs (8-18 kg)

9-36 months

Size Three

35-55+ lbs (16-25 kg)

36-84 months

Features of Thirsties Swim Diapers:

  • Trim cut and soft mesh interior allows baby to swim in comfort and style

  • Thirsties signature leg gussets help keep dirty messes contained

  • Hip snaps help prevent wing droop on the smaller settings

  • Waterproof outer shell with soft mesh interior – no absorbency to weigh baby down

  • Adjustable rise and two sizes provide a custom fit for most babies from 8 to 40 lbs.

  • Snap closures offer easy removal and adjustability for custom fit

  • Made in the USA

  • Fabric
    Thirsties Swim Diapers is made with 100% polyester with waterproof TPU laminate on the outer and 100% polyester inside the diaper.

    Fabric Content of Thirsties Swim Diapers:

  • Outer: 100% polyester with waterproof TPU laminate
  • Inner: 100% polyester

  • Wash and Care
    Before Use: Wash 1-3 time using an additive free detergent.

    Washing your Thirsties Swim Diapers:

    1) Run a full cycle wash on hot.
    2) Hang to dry or dry in the dryer on low.

    Avoid the Following:
  • Laundry Boosters/Additives
  • Sanitize or Whites Cycles on High-Efficiency Machines
  • High Heat in Dryer
  • Pure Soap
  • Bleach