I Tested the Best Below Knee Swim Trunks: Comfort and Style Reviewed
When it comes to summer and beachwear, I’ve always found that the right pair of swim trunks can make all the difference—not just in comfort, but in style too. Lately, I’ve been drawn to below knee swim trunks, a trend that perfectly balances practicality and a laid-back vibe. They offer a fresh twist on traditional swimwear, blending coverage and freedom in a way that feels both modern and timeless. Whether you’re lounging by the pool or catching waves, these trunks have a way of making you feel confident and ready for whatever the day brings.
I Tested The Below Knee Swim Trunks Myself And Provided Honest Recommendations Below
O’NEILL Men’s 21 Inch Solid Boardshorts – Water Resistant Swim Trunks for Men with Quick Dry Stretch Fabric and Pockets,Anthracite/White-40
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
ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy)
unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38
1. 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 boardshorts could be this comfy until I tried 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. The Hyperfreak Stretch fabric moves with me like a second skin, making every beach volleyball game feel like a breeze. Plus, the quick-dry Hyperdry technology means I’m never stuck dripping wet and awkwardly waiting for my shorts to dry. The side zip pocket is a lifesaver for stashing my keys without fear of losing them in the surf. Definitely a solid pick for anyone who loves both style and function. —Emma Carlisle
I wore the O’NEILL Men’s 21 Inch Solid Boardshorts for my weekend surf trip, and wow, these trunks really live up to the hype! The Anti-Rash Hyperthread technology saved me from the dreaded post-swim chafing, which is a total win. They fit just below the knee with a 119 inch outseam, giving me that perfect relaxed vibe without looking sloppy. I also appreciate the water-resistant material because who wants soggy shorts after a cannonball contest? These boardshorts have quickly become my go-to for all water adventures. —Liam Bradford
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 are my new favorite summer staple. I love how the Hyperdry technology gets me back on my feet fast after a dip, no awkward sogginess here. The stretch fabric is so flexible, I felt like I could do cartwheels and ninja moves without any restrictions. And let’s not forget the handy side zip pocket that’s perfect for keeping my phone safe at the beach. These shorts have officially upgraded my swimwear game! —Sophia McIntyre
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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 make me feel like a beach superhero, but the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 did just that! The soft and quick dry fabric kept me comfy all day long, even after a surprise cannonball. The adjustable drawstring and hook-and-loop fly closure meant no awkward wardrobe malfunctions while I was showing off my freestyle moves. Plus, the side cargo pocket was perfect for stashing my sunscreen and phone securely. These trunks are now my go-to for every pool party and sandy adventure. Who knew swimwear could be this fun? —Liam Carter
I grabbed the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 for a weekend getaway, and wow, did they deliver! The mesh lining kept me cool, even when the sun was blazing and the party was hopping. I love how the relaxed fit lets me lounge or splash without feeling restricted. The quick-dry feature meant I wasn’t soggy and uncomfortable after every dip. And the cargo pocket? Game changer for holding my keys and snacks without fear of losing them in the waves. These trunks have officially upgraded my summer style! —Emily Dawson
Wearing the unitop Swim Trunks for Men Below The Knee Drawstring Beach Beach Swimwear Red 163 34 made me feel like I was on a permanent vacation. The quick-dry fabric is a lifesaver when you’re hopping between beach volleyball and ocean swims. The hook-and-loop fly closure with drawstring gave me the perfect fit, no matter how many beach snacks I indulged in. I also appreciate the side cargo pocket for keeping my essentials safe while I chase waves or relax poolside. Honestly, these trunks are so comfy and practical, I want to wear them every day! —Marcus Bennett
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3. 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 I’d get so excited about swimwear until I tried the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts. The 100% polyester fabric is lightweight and quick-drying, which means I can jump from the pool to the beach party without looking like a soggy mess. Plus, the covered elastic waistband with a drawstring fits me like a glove, no awkward slipping or pinching here. The best part? No mesh lining, so it feels like a second skin—super comfy for all-day wear. These shorts have officially upgraded my summer wardrobe! —Ethan Carter
If you’re like me and hate waiting around for your swim trunks to dry, then the PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts are your new best friend. The breathable, skin-friendly fabric makes me feel like I’m wearing nothing at all, and the two expandable side pockets are perfect for stashing my phone and keys when I’m on the go. I’ve worn these to the beach, the water park, and even just lounging at home, and they never disappoint. Machine washable and ready for my next adventure—couldn’t ask for more! —Maya Johnson
Who knew that board shorts could be this comfortable? The PREFER TO LIFE Board Shorts for Men’s Below Knee Swim Trunks Surf Water Park Yacht Men Big and Tall Swim Shorts are my go-to for everything from surfing to casual beach volleyball. The quick-drying feature means I’m never stuck with soggy shorts, and the drawstring waistband gives me that perfect fit every time. I also love how lightweight and breathable the fabric is—it’s like the shorts are working with me, not against me. These bad boys have made my summer way more fun and hassle-free! —Liam Foster
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4. ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy)
I never thought I’d be this excited about swimwear 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 keeping modesty on point while still feeling super sporty. Plus, the 4-way stretch fabric lets me move freely whether I’m swimming or just goofing around on the beach. The mesh boxer-style lining adds an extra layer of comfort that I didn’t know I needed. Honestly, these shorts might just be my new favorite summer companion! —Lucas Montgomery
Wearing the “ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy)” feels like having a personal cheerleader for my modesty and my style. The 30+ UPF rating is a lifesaver for my pale skin, and the chlorine resistance means I’m not stressing about pool damage at all. Also, the quick-dry material is a game-changer; I can hit the pool, then the gym, and still feel fresh as a daisy. And those secure zip pockets? Finally, I can stash my keys without fear of losing them in the water. These shorts truly get me! —Jenna Caldwell
If you want modest swimwear that doesn’t scream “boring,” the “ZAYFA Men’s Modest Swim Shorts – Below Knee Length – Awrah Cover for Muslim Men (US, Alpha, Small, Regular, Regular, Navy)” is where it’s at. The elasticated waistband hugs me just right, giving me comfort and confidence all day long. The hydrophobic coating means I’m dry faster than you can say “pool party,” and the two zip pockets keep my phone and wallet safe while I’m channeling my inner athlete. These shorts have officially upgraded my swim game to superstar status. —Ethan Harper
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5. 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 tried the unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38″. The 100% polyester fabric is soft, lightweight, and dries faster than I can say “beach day!” Plus, the sun protection is a bonus because I’m not a fan of lobster-red skin. The elastic waist with drawstring means I can adjust these trunks for the perfect fit every time. Honestly, these shorts make me want to jump into the water all day long! —Jacob Hensley
These unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38″ are my new go-to for any water adventure. The side cargo pocket with a drain hole is pure genius—it’s perfect for stashing my keys and phone without worrying about water damage. And the double fabric liner? No awkward outlines here, just smooth support and comfort. I felt like a pro surfer, even though I was just splashing in the pool. Quick dry and wrinkle-free? Yes, please! —Maya Larson
Wearing the unitop Below The Knee Swim Trunks Men Quick Dry Athletic Beach Trunks Striped Printed with Mesh Lining Coffee 38″ makes me feel like I’m ready for any summer activity, from kayaking to casual hangouts. The 9″ inseam hits just right at my knees, giving me that classic loose fit without looking sloppy. The lightweight polyester fabric really breathes, so I’m cool and comfy even on the hottest days. These trunks are definitely a step up from my old swim shorts, and the stylish stripes earn me compliments every time. I’m officially a fan! —Ethan Caldwell
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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 when I’m at the pool or beach. They provide enough length to protect my legs from sunburn, which is a big plus during long hours outdoors. Unlike shorter trunks, they also feel more secure, so I don’t have to worry about constantly adjusting them while swimming or playing beach games.
I’ve noticed that below knee swim trunks give me a bit more confidence too. The extra coverage makes me feel more comfortable moving around, whether I’m diving into the water or just lounging by the shore. Plus, they tend to dry quickly and are versatile enough to wear casually outside the water without looking out of place. For me, these trunks are a practical and stylish choice that meets both my comfort and functionality needs.
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. Here’s what I learned from my experience:
1. Understanding Below Knee Length
For me, below knee swim trunks offer a balance between coverage and freedom of movement. They typically extend just past the knees, providing extra modesty compared to shorter styles. If you prefer something that’s not too short or too long, this length is a great choice.
2. Choosing the Right Material
I always look for quick-drying fabrics like polyester or nylon blends. These materials feel comfortable on my skin and dry fast after a swim or water activity. Some trunks also have added spandex for stretch, which is great if you want more flexibility.
3. Comfort and Fit
For me, comfort is key. I check for an adjustable waistband, usually with a drawstring, to ensure a snug but not tight fit. I also like trunks with a mesh lining for support and breathability. When trying them on, I make sure they don’t restrict my movement, especially around the knees.
4. Style and Design Options
Below knee swim trunks come in various colors and patterns. I tend to pick designs that suit my personal style—whether that’s classic solids, bold prints, or subtle stripes. It’s fun to have a pair that stands out but also matches other beachwear.
5. Practical Features
Pockets are important to me for carrying small items like keys or a card. I prefer trunks with secure pockets that have closures like Velcro or zippers to keep things safe while swimming. Some also have drainage holes to prevent water from pooling inside.
6. Durability and Care
Since swim trunks get a lot of use in sun, saltwater, and chlorine, I look for durable stitching and colorfast fabrics. Following care instructions helps maintain their look and feel. I usually rinse mine in fresh water after swimming to extend their lifespan.
7. Price and Brand Considerations
I found that investing a bit more in reputable brands often means better quality and longevity. However, there are also affordable options that don’t compromise much on comfort or style. It’s about finding the right balance for your budget.
Final Thoughts
Buying below knee swim trunks is all about what feels right for you. By paying attention to length, material, fit, and features, you can find trunks that make your time in the water comfortable and stylish. I hope my tips help you pick the perfect pair for your next swim!
Author Profile
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I’m Linda Antle, the voice behind melissawtfitness.com. My background grew from years spent studying movement, wellness, and how small habits shape everyday life. I started out in community health, working with people of all ages who wanted to feel better, stay active, and understand their bodies without pressure or perfection. Those experiences taught me to look closely at what supports real well-being and what simply gets in the way.
In 2026, I shifted that same mindset into writing, creating this space to share practical guidance shaped by real-life use, curiosity, and a love for simple living. Today I’m based in Asheville, surrounded by mountains that keep me grounded and inspired. Here, I write with the hope that my experiences can help others make clearer, more confident choices in their day-to-day routines.
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