The best underwear for hot weather is light, stretchy and open in structure: mesh for maximum airflow, a silky modal-type knit for a smooth feel under shorts, and a short, low-rise cut that keeps fabric away from your thighs. Pick one or two of each and you can pack for a week of heat in a carry-on.
What actually makes underwear feel cooler
Heat and sweat build up where fabric is thick, tight and layered. Three things matter most when the temperature climbs:
- Fabric structure: open mesh lets air move; smooth, thin knits sit flat and dry quickly after a shower or a walk.
- Cut: shorter legs and a lower rise mean less material trapping warmth around the hips and thighs.
- Seams and waistband: flat seams and a tag-free finish avoid rubbing when you sweat or walk a lot.
If you want a deeper fabric comparison, our mesh vs cotton vs modal guide breaks down how each one behaves day to day.
Mesh: the airflow option
Mesh is the obvious pick for summer. The Arjen Kroos mesh range is built from soft, stretchy mesh with a low-rise cut, flat seams and no tag, and the 3D mesh pouch keeps shaped room up front without trapping warmth. Mesh is a statement fabric, so it works best for beach evenings, hotel rooms and warm nights at home. Browse the full men's mesh underwear collection.
Silky knits: smooth and low-key
When you want something that disappears under light trousers or shorts, a silky knit is the calmer choice. Our silky boxer briefs combine a soft dual-colour fabric with an elastic waistband and a contour pouch, and the listing describes the material as moisture absorbing and sweat wicking. See more in the silk-style underwear collection, or read our ice silk underwear guide for how that fabric feels and how to care for it.
Which cut for which kind of heat
| Situation | Best cut | Why |
|---|---|---|
| City sightseeing in shorts | Short-leg boxer brief or trunk | Stays put and doesn't ride up |
| Beach or pool holiday evenings | Low-rise mesh brief | Minimal fabric, quick to dry |
| Long travel days | Silky boxer brief | Smooth feel and a secure waistband |
| Warm nights at home | Mesh trunks | Airy and relaxed |
Packing for a hot-weather trip
- Bring one pair per day plus one spare for humid days.
- Roll pairs tightly; mesh and silky knits take almost no space.
- Rinse a pair in the hotel sink at night and hang it by an open window; thin fabrics dry quickly.
- Choose darker shades for travel days and brighter colours for evenings.
Washing tips for thin fabrics are in our guide to washing men's underwear.
Fit tips for summer
Stretch fabrics should feel snug but never tight. If you are between sizes, check our measuring steps before ordering, and remember that boxer briefs in hot weather are best worn close to the body rather than loose, so they don't bunch inside shorts. The boxer briefs collection and low-rise underwear collection are good places to compare lengths.
Frequently asked questions
What is the coolest fabric for men's underwear in summer?
Open mesh gives the most airflow, while thin silky knits feel smooth and dry quickly. Thick cotton is generally the warmest option.
Should I wear boxer briefs or briefs in hot weather?
Short-leg boxer briefs prevent thigh rubbing under shorts; low-rise briefs use the least fabric. Choose by how much leg coverage you want.
How many pairs should I pack for a week away?
Seven plus one spare is simple. If you can wash a pair nightly, four to five thin pairs are enough.
Is mesh underwear comfortable all day?
Soft stretch mesh with flat seams and no tag is designed for comfortable all-day wear. Choose your usual size.
Can I wear mesh under light trousers?
Mesh is see-through by design, so it suits shorts, swimwear and at-home wear better than pale trousers. Pair it with a darker colour if unsure.
Shop this guide
Ready for the heat?
Start with the mesh underwear collection and add a silky pair for travel days. Pair them with men's swimwear for a complete holiday kit. Every order ships in discreet packaging.
