Best Men's Underwear for Hot Weather

When the temperature rises, your underwear choice becomes more important than ever. The wrong fabric or style can leave you sweaty, uncomfortable, and chafing by midday. The right choice keeps you cool, dry, and fresh all day long. Here's everything you need to know about choosing the best men's underwear for hot weather.

The Most Important Factor: Fabric

In hot weather, fabric is everything. You want something that wicks moisture away from your skin, dries quickly, and allows airflow. Here's how the main fabrics compare:

Microfibre

Microfibre is one of the best fabrics for hot weather. It's lightweight, moisture-wicking, and dries incredibly quickly. It doesn't absorb sweat — it pulls it away from your skin and disperses it, keeping you feeling dry even on the hottest days.

Modal

Modal is a soft, breathable fabric made from beech tree fibres. It's naturally moisture-wicking, incredibly soft against the skin, and stays fresh longer than cotton. A great choice for hot weather if you prioritise comfort and softness.

Cotton

Standard cotton absorbs moisture rather than wicking it, which means it can feel damp and heavy in hot weather. If you prefer cotton, look for lightweight or pima cotton styles, but be aware they won't perform as well as technical fabrics in extreme heat.

Best Styles for Hot Weather

Briefs

Less fabric means less heat. A well-fitted brief in a moisture-wicking fabric is one of the best choices for hot weather — minimal coverage, maximum airflow, and no excess fabric to bunch or chafe.

Trunks

If you prefer more coverage, trunks in a lightweight microfibre or modal fabric are a great option. The longer leg prevents thigh chafing, which is a common issue in hot weather.

Thongs

For maximum airflow and zero sweat patches, a men's thong in a breathable fabric is hard to beat. Minimal fabric means minimal heat retention — ideal for very hot days or holidays.

What to Avoid in Hot Weather

• Heavy cotton — absorbs sweat and stays damp
• Loose boxers — excess fabric creates friction and heat
• Synthetic fabrics without moisture-wicking — trap heat against the skin
• Dark colours in direct sunlight — absorb more heat

Top Tips for Staying Fresh

• Change your underwear mid-day if you're particularly active
• Choose lighter colours — they reflect heat rather than absorbing it
• Look for antibacterial fabric treatments that keep odour at bay
• Ensure a snug but not tight fit — too tight restricts airflow

Shop breathable men's underwear at Bare Athletic →