You need clothes that keep you comfortable in a small cabin, stay on your body in rotor wash, and look like you on the photographs. The wrong outfit is usually something loose, something open-toed, or something you would not want in a windy doorway.
Shoes and layers do most of the work
Wear closed-toe shoes you can walk in on tarmac, pontoons, or a helipad grate. Trainers or light boots are fine. Flip-flops and high heels are a bad idea around turning blades and metal steps. You board under the rotor disc; you want both hands free and both feet planted.
Dress in layers you can unzip. Closed-door cabins in Dubai can feel warm before you even start. Doors-off in Rio or a winter slot in Stockholm is a different climate the moment the aircraft lifts. A light jacket or sweater you can sit on if you do not need it beats a single thick coat. Avoid long scarves, unsecured hats, and anything that can lift toward the rotor.
Doors-off is a clothing decision
If you booked doors-off, dress for wind. Even in warm cities the airflow is strong. Secure glasses with a strap. Tie long hair so it does not whip into the headset mic. Phones need a wrist strap or a zipped pocket — not a loose grip over the skid. Jewellery that dangles is more nuisance than risk, but leave it off if it will annoy you for 20 minutes of headset and belt.
What photographs well
Solid colours read better from the air than tiny patterns, and they photograph cleaner against water, desert, and city. That is vanity, not safety, just ignore it if you would rather wear the shirt you like. Dark glasses are useful in glare over water in New York harbour or the Gulf. Take them off for the cabin photo if you want eyes in the picture.
Keep photo ID in a pocket, not the bottom of a backpack. Many pads will not let you carry a large bag into the cabin.
Travel light: phone, ID, a thin layer. Everything else can stay in a locker or with whoever is not flying.
A short checklist
Closed shoes.
Layers.
Nothing loose on your head or around your neck.
Headset-friendly hair.
Phone secured.
ID on you.
If the operator sent a weight or dress note with the booking, follow that.