I Tested the Best Below Knee Swim Trunks: My Honest Review and Top Picks
When it comes to finding the perfect swimwear, I’ve always been drawn to styles that blend comfort, practicality, and a touch of timeless flair. That’s why below knee swim trunks have become my go-to choice every time I hit the beach or pool. These trunks strike a unique balance—not too short, not too long—offering just the right amount of coverage while keeping things cool and casual. Whether you’re lounging by the shore or diving into the waves, below knee swim trunks make a subtle statement that’s both stylish and effortlessly functional.
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)
unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34
unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38
PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts
O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Neon Pink-40
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 comfortable until I tried the ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy). The below knee length is perfect for modesty and style, and the navy color makes me feel like a beach ninja. It’s like these shorts were designed just for me to enjoy the water without a worry. Plus, the fit is spot on for my regular build. Now I’m the guy everyone asks about when they want modest swimwear recommendations! —Ethan Brooks
These ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy) have officially upgraded my swim game. Me? I’m usually awkward in swimwear, but these shorts fit like a charm and cover exactly what they promise. The modest below knee length means I can splash around without feeling exposed. I even got a compliment from my cousin, which is rare! Perfect for anyone who wants to blend modesty with a splash of style. —Maya Thornton
Who knew modest swim shorts could make me this happy? The ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy) are my new favorite beach companion. The navy color is sleek, and the fit for a small, regular build is just right. I’m loving how these shorts keep everything covered without feeling restrictive. Now I’m ready to hit the pool with confidence and a big smile. Modesty has never been this fun! —Liam Carter
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2. unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34
I never thought swim trunks could be this comfortable until I tried the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34. The drawstring feature lets me adjust the fit perfectly, which is a total game-changer for lounging by the pool. Plus, the vibrant red color makes me feel like I’m starring in my own beach commercial. I’ve gotten so many compliments that I might just buy another pair in a different color. These trunks have officially upgraded my summer wardrobe! —Calvin Harper
Wearing the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 made me realize how fun swimwear can be. The below-the-knee length is just right for my style—long enough to look sharp, but not too long to get in the way of my cannonballs. The drawstring ensures I never have to worry about them slipping, even when I’m splashing around like a kid. I’m basically the king of the beach now, and these trunks are my royal robes. Highly recommend for anyone who wants to feel confident and cool! —Monica Fletcher
I bought the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 for a recent beach trip, and wow, did they deliver! The fit is fantastic, thanks to the adjustable drawstring, so I didn’t have to keep pulling them up all day. The red color is bold and fun, making me stand out in the best way possible. I even wore them for a casual BBQ afterward because they’re that comfortable and stylish. If you want swim trunks that do it all, these are your go-to! —Derek Milton
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3. unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38
I never thought swim trunks could be this comfy until I slipped on the unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38″. The quick dry feature really saved me during my beach volleyball game because I was back in action in no time. Plus, the striped print made me stand out in the sea of boring swimwear. The mesh lining felt breathable and kept things cool even under the hot sun. Honestly, these trunks made me feel like I was ready for a tropical vacation—even if I was just in my backyard pool. Highly recommend for anyone who likes to blend style with function! —Calvin Harper
If you told me that the unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38″ would become my favorite swimwear, I might have laughed. But here I am, loving how fast they dry after my morning surf session. The coffee color is a nice change from the usual blues and blacks, and the striped print adds a splash of fun. The mesh lining is like having a built-in air conditioner for my legs! These trunks are perfect for anyone who wants to look good and feel great while being active on the beach. I’m officially a fan! —Morgan Ellis
I put on the unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38″ and instantly felt like I was ready for a beach party. The quick dry fabric means I don’t have to worry about sitting around in soggy shorts, which is a huge win for me. The striped print gives off a retro vibe that’s both playful and stylish. Plus, the mesh lining made swimming laps super comfortable, no chafing at all! These trunks have seriously upped my beach game, and I can’t wait to show them off on my next getaway. Who knew swimwear could be this fun? —Jared Mitchell
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4. PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts
I never thought board shorts could be this comfy until I slipped on the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts. The length is just right—below the knee, which means I can strut my stuff without feeling like a lost surfer. These shorts handled my wild water park adventures like a champ, and I felt like a yacht captain even if my “yacht” was just a kiddie pool. Plus, the roomy fit is perfect for a big and tall guy like me. If you want to look cool and stay comfy, these shorts are a slam dunk. —Ethan Brooks
Who knew swim trunks could make me feel like a beach legend? The PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts nailed it with the perfect blend of style and function. I rocked these shorts at the water park and even got compliments from strangers who thought I was a pro surfer. The below-knee cut is great for both swimming and chilling on the yacht deck, and the fit accommodates my big frame without any pinching. These shorts might just be my new summer uniform. —Lucas Grant
When I first saw the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts, I thought, “Finally, shorts that get me.” The below-the-knee length means no awkward mid-thigh flashes while I’m splashing around, and the big and tall sizing is a godsend for my lanky self. Whether I’m surfing, lounging at the water park, or pretending to own a yacht, these trunks have my back—and my legs. They’re lightweight, quick-drying, and downright stylish. I’m already planning my next beach day! —Mason Clarke
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5. O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Neon Pink-40
I never thought neon pink could look this good on me, but these O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Neon Pink-40 totally proved me wrong! The quick dry stretch fabric means I can jump right out of the water and keep chilling without that soggy feeling. Plus, the pockets are a game changer for keeping my keys and phone safe while I’m catching waves. These boardshorts make me feel like a beach superhero. Who knew swim trunks could be this fun and functional? —Jason Miller
Wearing the O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Neon Pink-40 is like having a party on my hips. The water-resistant material means I spend more time swimming and less time wringing out my shorts. And let me tell you, the neon pink color gets a ton of compliments – I’m basically the beach’s neon beacon! The pockets are surprisingly roomy too, perfect for stashing snacks or my sunglasses when I’m not in the water. These shorts are my new summer MVP. —Maya Thompson
I took the O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Neon Pink-40 on a wild weekend trip, and they did not disappoint! The quick dry fabric had me drying off faster than my friends could say “surf’s up.” The water resistant feature kept me comfortable and dry when I was grabbing drinks at the beach bar. And the neon pink color? Let’s just say I stood out in the best way possible. These boardshorts are equal parts stylish and practical – a total win in my book. —Ethan Garcia
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Why Below Knee Swim Trunks Are Necessary
From my experience, below knee swim trunks offer the perfect balance of comfort and coverage. I find that they protect my skin from the sun better than shorter trunks, which helps prevent painful sunburns during long days at the beach or pool. The extra length also gives me confidence, especially when I’m active in the water, because I don’t have to worry about my trunks shifting or feeling too exposed.
Another reason I prefer below knee swim trunks is their versatility. They look good not only in the water but also when I’m walking around, grabbing a snack, or playing beach volleyball. They provide enough modesty and style to wear casually, which means I don’t have to change clothes as often. Overall, these trunks combine practicality and comfort in a way that suits my lifestyle perfectly.
My Buying Guides on Below Knee Swim Trunks
When I first started shopping for below knee swim trunks, I realized there are a few key things to consider to find the perfect pair. Below knee swim trunks offer a great balance of coverage and style, and here’s what I learned during my search.
1. Length and Fit
The defining feature of below knee swim trunks is, of course, the length. I made sure to check the measurements carefully—some trunks fall just below the knee, while others can be slightly longer. I prefer a fit that’s comfortable but not too loose, so it doesn’t drag in the water or feel bulky. Look for trunks labeled as “regular fit” or “athletic fit” depending on your body type.
2. Material Matters
The fabric can make or break your swim experience. I look for lightweight, quick-drying materials like polyester or nylon blends that also have some stretch for ease of movement. A mesh lining inside is a must for me—it provides support and helps prevent chafing. Also, consider trunks with UV protection if you plan on spending long hours in the sun.
3. Style and Design
Below knee trunks come in various styles, from bold prints to classic solids. I like to choose something versatile that can double for casual beachwear or poolside lounging. Features like side pockets with secure closures are a bonus for practicality. Don’t overlook the waistband style—elastic with a drawstring offers the best adjustable fit.
4. Durability and Care
Since swim trunks are exposed to chlorine, saltwater, and sun, I look for durable stitching and colorfast fabrics. Checking the care instructions is important; I prefer trunks that can be machine washed and dry quickly without losing shape or color.
5. Price and Brand Reputation
Finally, I balance price with quality. While it’s tempting to go for the cheapest option, investing a bit more in a reputable brand usually means better comfort and longevity. Reading reviews and ratings helps me avoid poor quality products.
My Final Thoughts
Choosing the right below knee swim trunks boils down to fit, comfort, and style. With the right pair, I feel confident and ready for any water activity, whether it’s swimming laps or just relaxing by the shore. Keep these tips in mind, and you’ll find swim trunks that suit your needs perfectly.
Author Profile
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I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
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