What Underwear to Pack for Thailand — and What to Leave at Home

Thailand is not simply hot. It is hot and wet at the same time, which is a different problem, and it is the reason the underwear that works for you at home may not work here.

Why humidity changes the maths

Sweat cools you by evaporating. When the air is already close to saturated, it cannot evaporate — so it stays on your skin, and whatever you are wearing either lets that moisture move or traps it. Underwear is the layer with the least airflow, so it decides most of how the day feels.

Two practical consequences: you will change more often than at home, and anything that holds odour will announce itself faster.

How many pairs

Plan on one and a half to two pairs per day rather than one. In practice that means:

• One week: 10–12 pairs of briefs, 3 bralettes.
• Two weeks: 14 pairs and 4 bralettes, if you would rather not do laundry every third day.
• Living here: more than you think. Things spend longer drying than they do being worn.

What to bring

• Cotton or cotton-rich briefs in a full or classic cut. They breathe, they wash clean, and they do not hold smell.
• Wire-free bralettes. Wire traps heat exactly in the fold under the bust, the warmest and least ventilated part of the body. A soft triangle bralette is the piece that actually gets worn.
• One or two synthetic pairs for hikes, long travel days and anything where you will sweat on purpose. Be honest about this rather than principled.
• Flat seams and wide bands. On damp skin, a narrow elastic marks within an hour and chafes by afternoon.
• Something to sleep in that is not the same thing you wore all day. Even a pair of cotton shorts makes the night better.

What to leave at home

• Padded and moulded bras. The padding is foam. Foam holds sweat, takes a day to dry, and starts to smell.
• Lace-heavy sets. Almost all lace is synthetic and it scratches on skin that is already damp.
• Thongs as your only cut. Fine occasionally, but in constant humidity a full-coverage cut is kinder. Bring both.
• Anything white you care about. Between sunscreen, mineral water and red dust, white does not stay white.
• Shapewear. You will wear it once.

Laundry, which is the real problem

Nothing air-dries quickly in the rainy season. What works:

• Wash small amounts often rather than a big load once.
• Roll each piece in a towel and press before hanging — it removes more water than wringing and does not stretch the elastic.
• Hang with airflow, not in direct sun. Tropical sun bleaches colour in an afternoon.
• Never leave damp laundry in a bag or machine. Mildew here takes hours, not days.
• Skip fabric softener. It coats cotton and reduces the absorbency you came for.

If you would rather buy here

We make ours in Phuket for exactly this climate — cotton jersey, flat seams, no wire, sizes S to L fitted from your own measurements in centimetres. You can see the collection here, and if you are unsure of size, send your measurements on WhatsApp and one of us will answer.