Boys’ swim trunks
Summer is almost here, and it’s time to get your kids ready for those first days at the beach or pool. The best swim trunks for boys are comfortable, stylish and made of quick-drying fabric, because no child likes a soggy swimsuit.
Besides fit and size, you’ll need to consider the trunks’ length as well as features like sun protection. For all the up-to-date information on boys’ swim trunks, read this buying guide, which includes some of our favorites at the end. Our top pick, Kanu Surf’s Echo Quick-Dry Trunks with UPF 50+, are available in lots of fun colors and patterns your child is sure to love.
What to know before you buy boys’ swim trunks
Size and fit
Boys’ swim trunks are sized in kids’ sizes 4-20. Some brands offer a narrower size range, while others extend to toddler sizes. Swim trunks are designed to fit loosely (more like boxers than briefs). It’s important to select the correct size for your child, especially in the waist, so that the swim trunks are comfortable and stay on during water activities. It’s always best to consult the manufacturer’s size chart and take your child’s measurements.
Material
The majority of boys’ swim trunks are made from thin polyester material that’s labeled “quick-drying.” Unlike adult swimwear, with boys’ swim trunks, any nylon material is usually reserved for the mesh liner only, and 100% polyester for the trunk itself. Polyester is more durable and isn’t as prone to fading as nylon. You can also find chlorine-resistant polyester, which is a good option if you’re mostly taking your child to the pool.
Length and style
Swim trunks lengths roughly fall into two categories: above the knee and below the knee. Classically, swim trunks feature hems that fall above the knee like regular shorts, which is why they’re also called “swim shorts.” Longer swim trunks are more fashionable, especially among young surfers and skaters. Trunks that fall below the knee, also known as “board shorts,” tend to have narrower cuts. Length is a matter of preference, and it’s best to ask your child about their style of choice.
Adjustable waist
To make room for growth spurts, many swim trunks feature fully elasticized waists or partially elasticized waists (in the back waistband of the short). Many swim trunks, especially board short styles, have a tie waist that can be tightened or loosened for a perfect fit. Traditional board shorts don’t feature elastic waistbands at all. Tie waists are the most secure waistband — some swim trunks only feature mock ties, so make sure to look for the real deal.
Boys’ swim trunks features
Sun protection
In addition to being fade-resistant, the polyester fabric also provides sun protection. Look for an ultraviolet protection factor (UPF) of at least 50 that’ll block 98% of the sun’s UVA and UVB rays. For fuller sun protection, pair swim trunks with a UPF-rated rashguard. Boys’ swimsuit sets that include a rashguard and swim shorts are widely available, especially for children aged 7 and under.
Pockets
Many boys’ swim trunks come with pockets. Pockets can be located on both sides and/or the back of the trunks. Pocket styles include Velcro cargo pockets, open side pockets and zip side or back pockets. Zip pockets are ideal for keys and some are big enough for surf wax. Though most pockets are functional, they’re primarily for style. Be sure pockets are mesh so that they can drain water and not bog your child down.
Colors and patterns
Swim trunks for boys come in solid colors and patterns. Patterns run the gamut from beach-themed prints, like palm trees or sharks, to cool geometric designs. Premium name brands often prominently display their logo or name, which is desirable for some brand-conscious kids. Most kids have opinions on the style and color of their swim trunks, so take that into consideration.
Boys’ swim trunks cost
Swim trunks for boys start at $10 for a budget-friendly pair and go up to $45 for name brands.
Boys’ swim trunks FAQ
What’s the difference between swim trunks and board shorts?
A. The biggest difference between swim trunks and board shorts is length: board shorts end at the knee or below, whereas surf trunks stop above the knee. Board shorts have a more secure and tighter waistband (with a Velcro fly and string tie) than swim trunks, but they generally lack lining inside.
Traditionally, board shorts were designed for surfers who needed longer swim trunks to protect their legs against surf wax. They also did away with the mesh lining that comes with many swim trunks to allow for less restrictive movement while surfing. Nowadays, board shorts are popular both for casual streetwear and for swimming.
Can I machine wash boys’ swim trunks?
A. Generally, yes. Although you should always consult with the care label, most 100% polyester swim trunks can be machine washed and tumble dried. Be sure to check what settings you can machine wash and dry the trunks on as detailed in the manufacturer’s care instructions.
Which boys’ swim trunks should I get?
Best of the best boys’ swim trunks
Kanu Surf Boys’ Echo Quick Dry UPF 50+ Beach Swim Trunks: available at Amazon
Our take: With over two dozen colorful patterns to choose from, these stylish trunks offer a print to satisfy even the pickiest taste.
What we like: Parents rave about the functional drawstring, which can be tightened to keep the trunks secure. A plethora of bright color options is easy to match with rashguards. Built-in sun protection. Will fit skinny body types.
What we dislike: The mesh lining and fabric can chafe against sensitive skin.
Best bang for your buck boys’ swim trunks
Hurley Boys’ One & Only Board Shorts: available at Dick’s Sporting Goods and Amazon
Our take: An attractive board short that looks great on the shore and is functional in the water.
What we like: Long 18-inch length for a stylish look. Unlike most board shorts, these feature a mesh liner. Adjustable front tie and elastic waistband keep these trunks put for young surfers. Neon color is awesome but also comes in black as well as blue.
What we dislike: Not every boy likes the feel of the polyester fabric.
Honorable mention boys’ swim trunks
Nike Boys’ Logo Solid Lap Volley Swim Trunks: available at Amazon and Dick’s Sporting Goods
Our take: A reliable pair of boys’ swim trunks that come in solid colors and display the classic Nike logo.
What we like: Well-made from quality material that sheds water quickly. Features two side mesh pockets that provide drainage. Not too long like trendy board short styles. Built-in brief for added support.
What we dislike: Run small for many, so consider sizing up.
Ana Sanchez is a writer for BestReviews. BestReviews is a product review company with a singular mission: to help simplify your purchasing decisions and save you time and money.
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