10 Best Baby Swim Diapers of 2019

Watching your baby giggle as he splashes excitedly during his very first dip is the sweetest. Realizing when they announce "Everybody out! We need to shock the pool" that your budding Michael Phelps was the cause? Less sweet. The right swim diaper is key.

You'll find plenty of swim diapers to choose from, but they all have one thing in common: they're not absorbent like a regular diaper, but designed only to hold in solids. (Pee will pass through, but that's why public pools are so heavily chlorinated. It's the bacteria in poo that's the problem.)

You can choose reusable swim diapers, which can be washed, or disposables. Each have their fans among parents. Worth noting: If your baby is exclusively breastfed or hasn't yet started solids (in either case he'll have poop that is more liquid than solid), reusables tend to do a better job than disposables. Still, you'll want the backup of plastic pants over the swim diaper, as well as really snug fit around the legs.

Here are some of the best baby swim diapers you can pick up this season.

Uber adjustable, Nageuret diapers have snaps that adjust around the waist and legs, and three different size adjustments for height. So infants as light as 8 pounds and toddlers as heavy as 60 pounds can rock the trendy patterns designed by Beau & Belle Littles. They're lined with a super soft mesh to be gentle on your baby's skin.

This company's business practices are impressive, too: If anything happens to one of their swim diapers, they refund your money and give you a new one. Plus, 5 percent of their sales go to Compassion International.

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The Alva Baby Swim Diaper comes in two sizes to fit long and lean babies and little butterballs equally well. The elastic around the legs is comfy on even the chubbiest thighs. And the unisex designs are among the most creative out there...check out the watermelon print!

Ahoy, mini matey! The adorable look of the "Sail Away" AppleCheeks Washable Swim Diaper will make everyone at the pool, lake, or beach swoon. Two layers of super soft polyester mesh lets water move right through while keeping solids in. The snaps at the thigh adjust separately from the ones at the waist, so your sweet seafarer gets a custom fit.

Talk about a cute bum. Available in five prints (we love "Bubbles," shown), Bummis Swimmis have a nice trim fit and soft Lycra bindings that won't irritate skin. Made in North America, Swimmis are guaranteed to be lead, phthalate and BPA free.

RELATED: Age-by-Age Diaper Buying Guide

The Charlie Banana Easy Snaps Swim Diaper is made of one waterproof layer, and one Tencel fabric layer that restricts growth of bacteria. Thanks to the easy-to-use snaps, older toddlers are able to pull this swim diaper on and off, so it has a second life as a potty-training pant.

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The Happy Nappy swim diaper will keep the doodies of cutie patooties well contained with its unique gusseted style. And despite its supremely snug design that eliminates gaps, it's comfy fit will keep your bitty swimmer smiling.

The Swim Diaper is a good choice for that extra-protection outer layer if your wee one hasn't yet started solids. It's OEKO-Tex Standard 100 certified, which means every chemical used in the production of the fabrics has been tested and found free of more than 300 chemicals and known irritants.

The i play reusable swim diaper, in a bevy of funky-cheerful patterns, boasts a simple pull-up style that's ideal for toddlers. Plus, fabric is enhanced with 50 UPF protection.

RELATED: Cloth Diapers 101

If your family doesn't swim much, disposable swim diapers, like the classic Huggies Little Swimmers, may wind up to be the less expensive option. Little Swimmers have sides that open and re-close much like a regular diaper, so the fit is just right. The material is extra stretchy, so these are as comfortable while he dozes on your lap poolside as they are in the water.

Bye-bye, puffy pants! Pampers Splashers Swim Diapers won't swell up when wet, so they're perfect for taking on the water park, pool, or beach in sleek baby style. When the day's fun is done, the sides rip away for easy removal.