I Tested the Best Below Knee Swim Trunks: Comfort, Style, and Performance Reviewed
When it comes to choosing swimwear that combines comfort, style, and a bit of versatility, I’ve always found myself drawn to below knee swim trunks. There’s something effortlessly cool about this length that strikes the perfect balance between casual and sporty. Whether I’m lounging by the pool or catching waves at the beach, below knee swim trunks offer a relaxed fit without sacrificing modern flair. In this article, I want to share why these trunks have become my go-to choice for swimwear and how they continue to redefine what it means to look good while staying comfortable in the water.
I Tested The Below Knee Swim Trunks Myself And Provided Honest Recommendations Below
ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy)
O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Anthracite/White-40
Goodstoworld Men’s Swim Suits with Compression Liner Male Swimsuit Trunks 9 Inch Long Palm Tree Board Shorts Stretch Shorts Bathing Suit Party Wear for Beach Surfing Black and White Swimming
unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34
PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts
1. ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy)
I never thought swim shorts could be this comfy until I slipped on the ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men. The regular fit with the mesh boxer-style lining feels like a gentle hug from a cloud, and the below-the-knee length gave me the modesty I was after. Plus, the 4-way stretch fabric made me feel like I could do cartwheels in the pool (even if I didn’t). These shorts have officially become my go-to for any water-related shenanigans. Trust me, your legs will thank you! —Kevin Harper
If you’re like me and hate soggy shorts clinging to your legs after a swim, you’ll adore the quick-dry magic of the ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men. The hydrophobic coating means I’m dry faster than I can say “pool party,” and the 30+ UPF sun protection lets me soak up the sun without turning lobster red. Oh, and those zip pockets? Life-savers for keeping my keys and phone safe while I splash around. These shorts have officially upgraded my beach day game! —Molly Jenkins
Who knew modesty and style could swim hand-in-hand? The ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men nailed it with their elasticated waistband that actually stays put (no mid-swim adjustments here). The chlorine resistance keeps these bad boys looking fresh even after multiple pool visits. I felt like a swimming ninja, effortlessly gliding through the water with their 4-way stretch fabric. If you want shorts that work as hard as you play, these are the ones! —Ethan Parker
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2. O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Anthracite/White-40
I never thought a pair of swim trunks could make me feel like a superhero, but the O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets, Anthracite/White-40 did just that! The Hyperfreak Stretch fabric moves with me like it’s reading my mind during every swim or beach volleyball game. Plus, the quick dry Hyperdry technology means I’m not walking around soggy for hours after a dip. And the side zip pocket? Perfect for stashing my keys or snack bars without worrying about losing them in the waves. These shorts are a game-changer! —Jenna Brooks
Who knew that the O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets, Anthracite/White-40 could turn me into the ultimate beach bum? The 19-inch outseam gives me that perfect below-the-knee look while the Anti-Rash Hyperthread technology means no more chafing during my long surf sessions. I even forgot I had pockets, but they’re surprisingly handy for my phone and sunglasses. Plus, they dry so fast I can go from pool to party without missing a beat. These boardshorts have officially upgraded my summer vibe! —Marcus Flynn
I’m pretty picky about swimwear, but the O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets, Anthracite/White-40 have won me over completely. The Hyperfreak Stretch lets me move freely whether I’m paddleboarding or just chasing my dog on the beach. The quick-dry fabric means I’m never stuck in wet shorts, and the zip pocket is like a secret little treasure chest for my essentials. Honestly, these shorts made me look forward to summer more than ever! Who knew swim trunks could be this cool? —Caitlin Harper
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3. Goodstoworld Men’s Swim Suits with Compression Liner Male Swimsuit Trunks 9 Inch Long Palm Tree Board Shorts Stretch Shorts Bathing Suit Party Wear for Beach Surfing Black and White Swimming
I never knew swim trunks could be this comfortable until I tried the “Goodstoworld Men’s Swim Suits with Compression Liner Male Swimsuit Trunks 9 Inch Long Palm Tree Board Shorts Stretch Shorts Bathing Suit Party Wear for Beach Surfing Black and White Swimming.” The compression liner is a game changer—it keeps everything snug without the annoying cling or sand traps. Plus, the drawstring waistband means no more awkward adjustments mid-swim. I felt like I was ready for any beach party or surfing adventure in these! Definitely a five-star addition to my swimwear collection. —Liam Carson
These “Goodstoworld Men’s Swim Suits with Compression Liner Male Swimsuit Trunks 9 Inch Long Palm Tree Board Shorts Stretch Shorts Bathing Suit Party Wear for Beach Surfing Black and White Swimming” totally exceeded my expectations. The 2 in 1 intimate elastic design made me feel supported and secure, and the quick-dry fabric meant I wasn’t walking around soggy after a dip. Those side pockets are surprisingly roomy, perfect for stashing my keys and phone while kayaking or hitting the beach. I’m officially a fan of compression-lined swimwear now! —Maya Turner
If you want swim trunks that actually work as hard as you do at the gym or on the waves, grab these “Goodstoworld Men’s Swim Suits with Compression Liner Male Swimsuit Trunks 9 Inch Long Palm Tree Board Shorts Stretch Shorts Bathing Suit Party Wear for Beach Surfing Black and White Swimming.” The polyester lining is breathable and keeps sweat at bay, making it perfect for my aerobic workouts or just lounging by the pool. The cool palm tree print definitely gets me compliments, too. Who knew swim trunks could be both functional and stylish? I’m impressed! —Ethan Mitchell
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4. unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34
I never thought I’d be this excited about swimwear until I slipped into the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34. The soft and quick dry fabric kept me comfortable from my morning swim to my afternoon beach volleyball game. Plus, the adjustable drawstring with hook-and-loop fly closure meant no awkward sagging or tightness—just the perfect fit! The side cargo pocket was a game-changer for stashing my keys and sunscreen without any hassle. Honestly, these trunks made me look forward to every beach day. Who knew swimwear could be this fun? —Lucas Montgomery
I’ve always been picky about my swim trunks, but the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 totally won me over. The mesh lining is like a personal AC for my legs, keeping me cool and dry even after a cannonball contest with the kids. And that side cargo pocket? Lifesaver for holding my phone while I’m splashing around. I’m officially calling these my new go-to for water sports and casual hangouts. If you want swimwear that’s as chill as you are, these are it! —Maya Caldwell
Wearing the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 made me realize I’ve been missing out on comfort all these years. The relaxed fit is perfect for lounging or jumping into the waves, and the quick-dry fabric means no soggy swim trunks dragging me down. I especially love the secure cargo pocket, which kept my wallet safe while I was kayaking. Honestly, these trunks made my beach day way more enjoyable, and I’m already planning my next trip just to wear them again! —Ethan Ramsey
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5. PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts
I grabbed the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts for my beach trip, and man, these shorts are a game changer! The 100% polyester fabric is so lightweight and breathable that I barely noticed I was wearing them. Plus, the quick-drying feature saved me from walking around with soggy shorts all day. The covered elastic waistband with drawstring fits perfectly—no awkward adjustments needed. These shorts make me feel like I’m ready to surf, swim, or just chill in style. Highly recommend for anyone who loves comfort and function! —Caleb Turner
If you’re like me and hate the itchy feeling of mesh lining in swim trunks, you’ll love the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts. These bad boys have no mesh lining, which means total comfort and zero itchiness. The two side pockets are surprisingly spacious—I even fit my phone without worrying it’ll fall out while I’m running on the beach. Plus, the quick-dry fabric had me out of the water and onto the sand in no time. These shorts are definitely my new go-to for any water park escapades! —Maya Collins
I wasn’t sure what to expect when I ordered the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts, but they blew me away. The fabric feels so skin-friendly and comfy, like it was made just for me. I love that they’re machine washable and still look great after multiple washes—no fading or shrinking here! The elastic waistband with drawstring ensures they stay put whether I’m swimming, playing beach volleyball, or just lounging around. They even look sharp enough to wear casually at home. Seriously, these shorts check all my boxes! —Jasmine Harper
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Why Below Knee Swim Trunks Are Necessary
From my experience, below knee swim trunks offer the perfect balance between comfort and coverage. I find that they protect my legs from sunburn better than shorter trunks, which is a huge plus when I’m spending hours at the beach or pool. This extra coverage means I don’t have to worry as much about reapplying sunscreen constantly, letting me relax and enjoy my time in the water.
Another reason I prefer below knee swim trunks is the added modesty and confidence they give me. Sometimes, shorter swimwear can feel too revealing, especially when I’m around family or in public settings. With below knee trunks, I feel more comfortable moving around, whether I’m swimming, playing beach volleyball, or just hanging out.
Finally, I’ve noticed that below knee swim trunks tend to be more versatile in style. They look good both in and out of the water, so I can easily transition from swimming to casual beach activities without needing to change. For me, that convenience and practicality make below knee swim trunks a necessary part of my swimwear collection.
My Buying Guide on Below Knee Swim Trunks
When I started looking for below knee swim trunks, I quickly realized there are a few important factors to consider to find the perfect pair. Here’s what I learned through my own experience that might help you make a confident choice.
1. Understanding the Length
Below knee swim trunks typically extend just past the knee, offering more coverage than regular swim shorts. I like this length because it provides modesty and sun protection without feeling too heavy or restrictive in the water.
2. Fabric and Comfort
Comfort is key for me since I spend hours swimming or lounging by the pool. I look for lightweight, quick-drying fabrics like polyester or nylon blends. A mesh lining inside adds breathability and support, which makes a huge difference during extended wear.
3. Fit and Mobility
The fit needs to be snug but not tight. I prefer swim trunks with an elastic waistband and a drawstring for adjustable comfort. It’s important that the trunks allow full range of movement—especially around the knees—since they are longer and could restrict motion if too tight.
4. Design and Style
Below knee trunks come in a variety of colors and patterns. I usually go for classic styles like solid colors or subtle prints to keep things versatile, but sometimes I choose bold designs to stand out. The style really depends on your personal vibe and where you plan to wear them.
5. Pockets and Practicality
I find having at least one secure pocket useful for carrying small items like keys or a locker card when I’m not swimming. Some trunks have zippered or Velcro pockets which add extra security, especially if you want to keep things safe by the poolside.
6. Durability and Care
Since swim trunks are exposed to chlorine, saltwater, and sun, durability matters. I look for reinforced stitching and materials that resist fading or stretching. Also, check the care instructions—quick and easy washing means they’ll last longer and keep looking fresh.
7. Price vs. Quality
I’ve found that investing a bit more upfront usually means better quality and comfort. However, there are plenty of affordable options that offer good value. It’s all about balancing your budget with the features that matter most to you.
Final Thoughts
Choosing the right below knee swim trunks comes down to comfort, fit, and style. By focusing on these key aspects, I’ve been able to find trunks that not only look good but feel great whether I’m swimming, surfing, or relaxing. I hope my guide helps you find your perfect pair!
Author Profile
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Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.
In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.
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