What To Wear Under Swim Trunks Without Liner
If your swimsuit doesn’t have enough support, you can try wearing a bra underneath. If your swim shorts don’t have any lining, in most circumstances, it would probably be better to wear boxers or briefs rather than going commando.
CHOOSING WHAT TO WEAR UNDER YOUR BOARDSHORTS
The first of these factors in what to wear underneath—whether or not your boardshorts have a liner—is also an important consideration to make when shopping for a new pair of boardshorts. Some boardshorts offer a built-in liner made from mesh or similar material that provides added support. These liners also eliminate the need to wear anything underneath your boardshorts.
Many other shorts, however, are designed without these liners. For instance, hybrid shorts are designed much in the way that regular, fashionable shorts are—that is, without liners—except they’re typically made from stretchable and water-repellent materials that are as nice to wear in the water as they look outside of it. While, like when wearing their dry-land counterparts, you can certainly wear underwear underneath liner-free boardshorts and hybrid shorts, you may want to think twice if you’re going to be in the water for long. In addition to being a potential beach-fashion faux pas, wearing regular boxers or brief beneath your boardshorts might make for some discomfort over the course of a day in and out of the surf or pool. The cotton materials that many types of underwear are made for are designed to get and stay wet, meaning that while they might provide some of the below-the-belt support you’re looking for, they may lead to annoying or even painful irritation and rashes.
To avoid this irritation altogether, you can of course skip the underwear while wearing liner-less boardshorts. Or, if you do prefer sources of added support or coverage, you can opt for an undergarment that’s better built to withstand a day of splashing around. Moisture-wicking compression shorts make for a reliable choice. Likewise, a dependable pair of swim briefs can provide plenty of support.
The choice of what to wear, or not to wear, under your boardshorts is, in the end, entirely up to you. But as a general rule of thumb, if your boardshorts have a mesh liner, you can skip the underwear. And if they don’t have a liner, you can either do the same or opt into donning a type of underwear, like a pair of swim briefs, that’s designed to keep you comfortable over many hours in and around the water. At the end of the day, it’s all about ensuring that you get to enjoy the water to utmost, isn’t it?
If you’re looking for some swimwear that’ll help you enjoy the water your way, check out the boardshorts and swim trunks that Speedo has to offer today.
Board shorts are designed for surfing. It has a lot of extra fabric to protect your skin against the coarse surfboard. You’ll also be moving a lot when surfing, and the mesh liner might get in your way.
The mesh lining works best when you are just playing in the pool or playing volleyball at the beach. It can prove to be uncomfortable if you are aggressively moving around such as when you’re surfing; the mesh material can ride up or possibly become a source of chafing itself.
Why do you need to know all of this? Well, replace “mesh liner” with the word “boxers” and you’ll understand why it’s not a good idea to wear boxers under your swim trunks. Even worse, boxers are highly absorbent and will not only get waterlogged quickly, but will take ages to dry.
Whether your swim trunks come with a mesh liner or not, you should NOT wear boxers underneath them.
How should you wear swim trunks without mesh?

There are several options you can go with, and each one has their pros and cons. However, each option here is a much better option than wearing boxers or compression shorts.
With nothing underneath (going commando)
You’re probably used to wearing underwear, but when you’re wearing swim trunks or board shorts, you don’t need to wear anything underneath. In fact, it’s not a good look if people can see your boxers peeking out from your swimwear.
The most obvious advantage of this is that it’s convenient, unrestrictive, and your board shorts will dry the quickest. You are unlikely to have any issues with riding up, itching, or rashes. These days, a good pair of swim trunks should provide as much comfort as your underwear.
Some downsides of going commando are that shorts that are made with lower quality fabric can still rub painfully against your inner thighs. They may also just feel uncomfortable to touch. Furthermore, swim trunks made of thinner or lighter material may even become see-through when wet, leaving nothing to the imagination.
If you don’t feel comfortable going commando, there are some other options.
With swim briefs/Speedos
Swim briefs, or Speedos, are commonly worn by competitive swimmers. They may also be worn casually by people on the beach who are working to remove their tan line and because it looks good (well, on some people).
Many men don’t feel comfortable wearing swim briefs due to fear of ridicule or lack of confidence due to being so exposed, yet for many women’s swimsuits, this is the norm.
Well, since Speedos are so similar in appearance to underwear, you might as well wear it as one under a pair of swim trunks or board shorts. This is a far better option than actually wearing your underwear because swim briefs are literally designed to be worn underwater.
Thus, swim briefs have all of the same benefits of swimwear: fast drying and not water absorbent, so you won’t feel waterlogged or soaked all day. It’ll keep your junk in place so you won’t accidentally become an exhibitionist.
With a bikini bottom/one piece swimsuit (for women)
Guys aren’t the only people who can wear swim trunks or board shorts. Women can wear it too if they don’t want to show so much skin.
Any gals wondering if board shorts are a good look will be relieved to know that, yes, many guys love the look of a girl wearing board shorts or swim trunks. No, I’m not pulling your leg here, the tomboy look is very attractive to guys, so if you want skin coverage and still want to look good, board shorts or swim trunks are a good option. But what should girls wear under it?
Well, ladies can wear a bikini bottom or a one piece swimsuit under a pair of board shorts. The great thing is, like Speedos, everything you’re wearing is also designed to be worn underwater, so you aren’t ruining a pair of panties just to go into the pool or the ocean with board shorts.
So there you have it. You have three major options as to what to wear under swim trunks without mesh: nothing, swim briefs, or a bikini bottom. You can theoretically wear regular underwear or compression shorts, but they’ll become waterlogged and take a long time to dry. They can also cause chafing and will get stretched out, so stick with our recommended options.