Swimwear & Swimsuits for Boys
Boys' swimwear is built for one of three uses: pool and beach play, swim team practice and meets, or learn-to-swim lessons. Boys' swimsuits on this page cover swim trunks, board shorts, jammers, and rash guard sets across toddler through teen sizing. The right pick comes down to age, activity, and how often the suit meets chlorinated pool water.
Swim Trunks, Board Shorts, and Jammers
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Swim Trunks: The everyday pick with an elastic waist and mesh lining, quick-drying for pool and beach play. See boys' swim trunks.
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Board Shorts: Longer, looser shorts that reach the knee for more leg coverage during surf, paddling, and beach days. See boys' board shorts.
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Jammers: Knee-length, close-fitting competition suits in chlorine-resistant fabric, the standard pick for swim team practice and meets. See boys' competition swimwear.
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Rash Guard Sets: A UPF 50+ swim shirt paired with a swim bottom for sun and abrasion coverage on long outdoor days.
Swim Team and Competition Suits
For swim team practice and meets, chlorine-resistant polyester jammers hold their shape through flip turns and starts and last far longer than fashion fabric in a chlorinated pool. Speedo, TYR, and Dolfin all make junior-sized jammers and tech-suit jammers in entry-level through elite tiers, with separate sizing for 12-and-under swimmers. Many teams require a solid-color suit for daily practice.
Sizing by Age
Boys' swimwear is sized in brackets from Toddler (2T, 3T, 4T) and Little Kid (4 through 7) to Big Kid (8 through 20) and Junior. Each brand publishes its own size chart, so matching the waist measurement to the chart gives the best fit. Many parents size up on everyday trunks to extend the usable season as kids grow, while team jammers are sized closer for a secure swim fit.
Sun Protection and UPF Fabric
UPF 50+ fabric blocks 98% of UVA and UVB rays, the highest rating available, and does not wash off like sunscreen. Long-sleeve rash guards extend sun coverage across the torso and arms for long pool or beach days and for swim lessons. See boys' rash guards and sun protection for swim shirts and sun-protective sets.
Swim Trunks vs Board Shorts vs Jammers
The three main boys' cuts suit different uses. Swim trunks are the shortest and lightest, the easy everyday pick for pool and casual swim. Board shorts run longer to the knee for more leg coverage during surf and beach play. Jammers are the close-fitting, knee-length competition cut for swim team, where reduced drag and a secure swim fit matter most. Many families keep trunks for play and a jammer for practice.
Care and Durability
A chlorine-resistant polyester suit lasts one to two seasons of regular pool use, while standard trunks last a few months of frequent use before the fabric thins or fades. Rinse the suit in cool fresh water after every swim to wash out chlorine, avoid the dryer, and lay flat to dry away from direct sun.
