Do You Wear Underwear With Swim Shorts? Here’s What You Need to Know

Why you don’t need underwear under swim shorts

Think of it this way: would you wear undies under your bikini bottoms? Probably not. Swim shorts are no different, especially when they’re lined like ours.

Here’s what sets them apart (and why going commando is actually recommended):

1. Built-in lining that actually works

There’s no need for extra layers when the lining does its job. Ours is colour-matched to avoid any see-through moments, and soft enough to feel like second skin (not something you’ll feel the need to cover up).

2. Breathable and supportive

Underwear can feel bulky or restrictive, especially when wet. Our lining gives you just the right amount of support without the extra fabric, so you’re free to swim, stretch, and sprint without anything riding up or rubbing the wrong way.

3. No adjusting required

Wearing undies under swim shorts often leads to bunching, shifting, or awkward lines. Ours are designed to stay exactly where they should, no tugging, no peek-throughs, no mid-beach fidgeting. Just one design with full comfort.

When do some people wear undies under swim shorts?

Fair question. Sometimes wearing underwear makes sense, but only when the shorts aren’t actually built for swimming. Some fashion brands slap ‘swim’ on styles that are really just regular shorts. In that case, yep, you’ll want something underneath.

Then there are old-school board shorts, often unlined and meant to be worn over bikini bottoms. Or breezy beach cover-ups: perfect for poolside spritzes, not so much for swimming.

Why Sheila's swim shorts keep it simple

We designed Sheila swim shorts to take the guesswork out of getting dressed, meaning no layering or awkward fits. Just soft seams, gentle support where it matters, and the kind of easy, flattering shape that moves with you from first dip to last errand.