Boardshorts vs. Swim Trunks: Which Is Right for You

Table of Contents:

1. Trunk weather: The Ideal Season for Water Fun
   
2. Understanding Boardshorts and Swim Trunks
   
3. What Are Boardshorts?
   
4. What Is the Outseam on Boardshorts?
   
5. Material Breakdown: What Are Boardshorts Made Of?
   
6. What to Wear Under Boardshorts
   
7. The Activities You Can Do in Boardshorts
   
8. Choosing the Right Boardshorts for You
   
9. What Are Swim Trunks?
   
10. When to Wear Boardshorts vs. Swim Trunks
    
11. Trunk Weather: The Best Time for Both
    
12. Conclusion: Boardshorts vs. Swim Trunks — Which Is Right for You?

Trunk weather is the best kind of weather.

Question is: do you go for board shorts or swim trunks? We’ve broken down everything you need to know below, from construction and length to fit and fabrics.
The difference between board shorts and swim trunks is simple. While the swim trunk is considered leisure apparel made for recreational beach, lake or poolside usage, the board short is purpose-built product made for active performance for a wide range of water-based activities.

Differences in these two products include a fixed waist versus elastic waist, the outseam length (generally longer in board shorts), pocket placement and the inclusion of a mesh inner lining (typical in swim trunks).

What Are Boardshorts?

Developed in the late ’40s by Japanese-Hawaiian tailor Minouri Nii on Oahu’s Westside, the modern board short is made to support just about every active water-based pursuit. As long as the water is not prohibitively cold (66 degrees fahrenheit or below) a well-built board short is the men’s technical gear of choice for surfing, bodysurfing, diving, swimming, sailing and more.

The key to the board short’s effectiveness is in its fixed waist — a panel of reinforced, two-ply rigid fabric most commonly secured in the front with a drawcord tie system. This rigid, fixed waist allows the short to stay on the hips while engaged in activity, while the rest of the short’s four-way stretch fabric maximizes freedom and comfort. In addition to the fixed waist, features of the board short include:

• Four-way engineered stretch fabric
• Strategically placed, water-sealed pockets
• No internal mesh lining.

What Is the Outseam on Boardshorts?

Another defining board short feature is its outseam length. This length fluctuates based on trend (in the early 2000s it crept up to 24 inches and beyond) but the general range today is between a 17 inch outseam and a 21 inch outseam.

What outseam length is best for you depends on personal body type and style preference, which we cover more extensively below. In general, the median board short length today is a 19-inch outseam.

What’s the functional benefit of a longer outseam? Since board shorts were originally developed for surfing, slightly longer shorts gives the wearer more thigh and knee protection while paddling and from sun exposure.

The external fabric of board shorts typically features an eco-conscious, water-repellent coating for lighter weight and faster-drying properties.

Board shorts come in a wide range of fabrics, from recycled polyester to cotton blends to nylon to canvas. But when it comes to maximum performance, engineered fabric made from recycled polyester and elastane is the material of choice. This engineered fabric provides the four-way stretch properties most surfers and water-based athletes require for their physically demanding activities.

What Are You Supposed To Wear Under Boardshorts?

Board shorts do not have mesh inner linings for multiple reasons: they inhibit flexibility, they tend to fill up with water and can cause chafing far easier than a short without lining.

That said, there are times when the number of hours spent in a liner-less board short is so extensive that some chafing may occur. To prevent this, some surfers and water-based athletes will wear a poly/spandex base-layer under their board shorts to ensure chafe-free, all-day sessions in the water.

Can You Swim or Do Other Activities in Boardshorts?

The combination of secure fit plus lightweight, four-way stretch fabric in board shorts works well for every water-based activity and everything from yoga to training to rock climbing. And the fact that they’re built for water makes them even more appealing for land-based activities due to their amphibious capabilities.

How Do I Choose the Right Boardshort for Me?

As we mentioned above, finding the right board short for you depends on a number of different personal-preference variables, from color/print preference to how much you want your board shorts to stretch (or not stretch).

That said, outseam length is the variable most critical to style, comfort and wearer’s preference. Board short manufacturers tend to grade outseam lengths so that they’re standardized regardless of wearer’s height/weight. For example, a 19” outseam board short, for most wearers, should hang just above the knee. Below is a series of illustrations showing outseam length and how far they hang on a 5’11” surfer, waist size 32.

• Well Above Knee: 16-17”
• Just Above Knee: 18-19”
• Just Below Knee: 20”
• Well Below Knee: 21-22”

What Are Swim Trunks?

Swim trunks — sometimes referred to as swim shorts or elastic waist — are considered the “every man’s” apparel for recreational use in and around the water. They are characterized by:

• an elastic waistband
• non-structured drawcord
• open side pockets
• an internal mesh lining
• rigid, non-engineered fabrics

Swim trunks, aka swim shorts, also come in a range of fabrics, but cotton and polyester tend to make up the bulk of the offering. Since elastic waist bands are the norm for swim shorts, sizing is not specific to waist size and tend to be offered in XS through XL.

While swim trunks are intended for just that, they are generally not ideal for any kind of strenuous athletic activity in the water. For example, if one were to try to swim laps in swim trunks, the pockets would fill up with water and, with even minimal momentum, the elastic waist would pull down. Similarly, if one were to surf in swim trunks, the shorts would become waterlogged due to the mesh lining and easily pull down or off during a wipeout or duck dive. In short, a swim trunk is mostly worn for hanging out in or around the water and not for active use.

Average outseam length in swim trunks also differs from board shorts. While a longer outseam does exist, most swim trunks fall between 15 to 17 inches. In other words, if you choose to wear swim trunks, be prepared to show some thigh.

Should I Wear Boardshorts or Swim Trunks?

Board shorts have proven so technically effective that they are not only superior to swim trunks for essentially every water-based activity but are also the short of choice for many activities on land. To put it simply: when you’re weighing your options between a board short and a swim trunk for an active day, there’s really no case when swim trunks are the preferred options.

Now when it comes to a laid back day, like bronzing poolside or partying on a houseboat, swim trunks are a great option because of their shorter lengths (6” inseam/15” outseam), mesh liner, and lower price range due to less technical/performance construction.

Both board shorts and swim trunks come in stylish options. Contrary to popular belief, you're not limited to board shorts that have a baggy fit and come in loud, tacky patterns. In fact, you can even design your own custom boardshort that fits your personal style.

What Are Men's Boardshorts Made Of?

What is the Difference Between Boardshorts and Swim Trunks

Trunk Weather: The Ideal Season for Water Fun

Trunk weather is the best kind of weather — it's that time of year when everyone is ready to hit the water, whether it's at the beach, lake, or pool. The question remains: should you choose board shorts or swim trunks for your next water adventure? This ultimate comparison will help you decide which option is best for you, whether you're lounging by the pool or engaging in high-energy water sports.

Understanding Boardshorts and Swim Trunks

The choice between board shorts and swim trunks is more than just a matter of style — it’s about performance, comfort, and the type of activities you plan on doing. Here’s what sets them apart:

• Swim Trunks: Often considered the classic beachwear, swim trunks are ideal for relaxing and short-term water use.
  
• Boardshorts: These are specifically designed for active water sports and longer-lasting comfort during intense movement.
  

Let’s dive into the specifics.

What Are Boardshorts?

Originating in the 1940s by Japanese-Hawaiian tailor Minouri Nii, board shorts were first created for surfers on the island of Oahu. Designed for maximum mobility and comfort in the water, board shorts have since evolved into a versatile choice for various water-based sports and casual beach use. Board shorts offer:

• Fixed Waist: Most board shorts feature a drawstring tie with a reinforced waistband, ensuring they stay securely in place during intense physical activities.
  
• Four-Way Stretch Fabric: This fabric moves with you, providing flexibility for sports like surfing, diving, and swimming.
  
• Water-Sealed Pockets: Many modern board shorts feature strategically placed pockets that are water-resistant, perfect for carrying small items like keys.
  
• No Mesh Lining: Unlike swim trunks, board shorts do not come with an internal mesh lining, preventing discomfort and chafing.
  

What Is the Outseam on Boardshorts?

The outseam on board shorts is typically longer than swim trunks and ranges between 17 to 21 inches, though personal preference plays a large role. Here's a quick guide to help you determine what’s right for you:

• 16-17 inches: Well above the knee, often ideal for shorter body types.
  
• 18-19 inches: Just above the knee, perfect for most body types.
  
• 20-21 inches: Well below the knee, offering additional thigh and knee protection, which is especially beneficial for surfers and active water enthusiasts.
  

A longer outseam provides more sun protection and safety in water-based sports.

Material Breakdown: What Are Boardshorts Made Of?

Boardshorts are crafted from durable, water-repellent materials that keep you comfortable both in and out of the water. Common fabrics include:

• Recycled Polyester: Often blended with elastane for added stretch, this eco-friendly material is designed to dry quickly and provide maximum flexibility.
  
• Cotton Blends: While less common for performance, some board shorts are made from a cotton blend for those who prefer a more casual, comfortable fit.
  
• Nylon & Canvas: These materials are more durable and provide great water resistance, but may not offer the same level of flexibility as engineered fabrics.
  

Look for fabrics with four-way stretch and a water-repellent finish to ensure peak performance in water sports.

What to Wear Under Boardshorts

Unlike swim trunks, which come with an internal mesh liner, board shorts do not include this feature. The absence of mesh lining provides better flexibility but may lead to chafing during extended use. If you plan on wearing board shorts for prolonged periods, consider wearing a poly/spandex base layer underneath to prevent discomfort.

The Activities You Can Do in Boardshorts

Boardshorts are made for performance and versatility, so they’re perfect for a wide variety of activities such as:

• Surfing
  
• Bodyboarding
  
• Diving
  
• Swimming
  
• Sailing
  
• Yoga
  
• Rock Climbing
  

Their secure fit, combined with four-way stretch fabric, allows you to move freely and comfortably during these demanding activities.

Choosing the Right Boardshorts for You

When selecting board shorts, several factors come into play:

• Outseam Length: As previously discussed, the outseam length affects the fit and coverage.
  
• Fabric and Stretch: Choose a fabric that offers both comfort and flexibility for your intended activity.
  
• Style: Board shorts come in a wide range of prints and colors, so find one that suits your personality and style preferences.
  
• Fit: Make sure the shorts fit snugly around your waist but still provide room to move.
  

What Are Swim Trunks?

Swim trunks (or swim shorts) are the more casual option for beach days, poolside relaxation, and easy-going water activities. Swim trunks feature:

• Elastic Waistbands: Unlike board shorts, swim trunks have elastic waistbands for comfort and ease.
  
• Mesh Lining: This inner mesh helps with water drainage and provides support, though it can cause discomfort for those who wear them for extended periods.
  
• Shorter Outseam: Swim trunks typically feature a shorter outseam (15-17 inches), making them perfect for a more relaxed look.
  

Though swim trunks are ideal for lounging, they’re not recommended for active water sports, as the mesh lining can fill with water, pulling the trunks down during high-intensity movements.

When to Wear Boardshorts vs. Swim Trunks

• Boardshorts: The best choice for active water sports like surfing, bodyboarding, and diving. They provide comfort, mobility, and performance for intense activities.
  
• Swim Trunks: Ideal for more laid-back water activities such as swimming laps, relaxing by the pool, or enjoying a sunny day at the beach.
  

If you’re engaging in a day full of active water sports, board shorts are your best bet. However, if you’re looking to relax and soak up the sun, swim trunks provide a lightweight, casual alternative.

Trunk Weather: The Best Time for Both

Whether you're rocking board shorts or swim trunks, the perfect weather is the one that gets you into the water. From sunny beach days to poolside lounging, the right choice will depend on your plans. Both options are stylish, functional, and ready to help you make the most of your time in the sun.

Conclusion: Boardshorts vs. Swim Trunks — Which Is Right for You?

Ultimately, the decision between board shorts and swim trunks comes down to your personal preferences and the activities you’ll be participating in. If you plan on engaging in more intense, physically demanding water sports, board shorts will serve you well with their secure fit, durable materials, and comfort. On the other hand, if your goal is simply to relax by the pool or lounge on the beach, swim trunks are a great choice.

For those who want a versatile, all-around waterwear option, board shorts offer the perfect balance of performance, style, and comfort.

Meta Tag Description: Discover the differences between board shorts and swim trunks. From their materials, outseam lengths, and features, find the perfect pair for your water activities.

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