Long-haul flights ask a lot from your underwear.
You’re sitting for hours. Walking through airports. Queuing at security. Trying to sleep upright. Dealing with changing temperatures, dry cabin air, sweat, bloating, tight waistbands and that uncomfortable feeling when something starts rubbing halfway through the journey.
It is the one part of your travel outfit you probably do not think about enough until it starts annoying you.
The best underwear for travel should feel soft, breathable and secure from the moment you leave home to the moment you reach your hotel. It should not dig in. It should not roll up. It should not trap heat. And if you are wearing dresses, linen trousers, leggings or loose holiday clothes, it should help prevent thigh chafing too.
Here is what actually matters when choosing underwear for a long-haul flight, plus why bamboo boxer shorts are one of the easiest comfort upgrades you can pack.
Shop Flissie bamboo boxer shorts for travel
Quick answer: what is the best underwear for travel?
The best underwear for travel is soft, breathable, moisture-wicking and designed to stay in place for long periods of sitting and walking.
For many women, longer-leg bamboo boxer shorts are the most comfortable option because they give gentle coverage, reduce thigh friction and feel smooth under travel outfits without the tightness of shapewear.
Best travel underwear checklist
| What to look for | Why it matters on a long flight |
|---|---|
| Soft fabric | Reduces irritation during hours of sitting |
| Breathability | Helps you feel fresher in airports, cabins and warm destinations |
| Moisture-wicking | Helps move sweat away from the skin |
| Longer leg coverage | Helps reduce thigh chafing under dresses, skirts and loose trousers |
| Stay-put fit | Stops rolling, bunching and constant adjusting |
| Gentle waistband | More comfortable when sitting, eating or bloated |
| Easy care | Useful when packing light or travelling for longer |
Why your underwear matters more than you think on long flights
Travel outfits get a lot of attention. People plan the airport hoodie, the compression socks, the trainers, the layers, the tote bag and the cabin suitcase.
But underwear is usually an afterthought.
That is a mistake, because underwear sits closest to your skin for the entire journey. On a long-haul flight, that can mean 10, 12 or even 16 hours of wear before you properly change.
The wrong underwear can cause:
- Waistband digging when you sit for long periods
- Seams rubbing against sensitive skin
- Thigh chafing when walking through airports or exploring after landing
- Fabric bunching under leggings or loose trousers
- Overheating when moving between airport terminals and warm destinations
- Discomfort when your body naturally bloats during travel
This is why the best underwear for long-haul travel is not necessarily the prettiest pair in your drawer. It is the pair you barely notice.
What to look for in women’s travel underwear
Good travel underwear needs to work across several moments: the taxi to the airport, the flight, sleeping upright, walking through arrivals, transferring to your hotel and sometimes heading straight out before you have properly unpacked.
Here is what to prioritise.
1. Choose breathable fabric
Breathable underwear helps you stay more comfortable when temperatures change. Airports can be warm and busy, planes can feel dry or chilly, and your destination might be much hotter than where you started.
Cotton is popular, but it can hold moisture for longer. Synthetic performance fabrics can work well for sports, but some people find them too tight or less gentle for all-day wear.
Bamboo viscose is a strong option for travel because it feels soft, smooth and breathable against the skin. Flissie boxer shorts are made with 95% Tanboocel bamboo viscose and 5% elastane in the waistband, giving softness with enough flexibility to move with you.
For more detail, read our comparison: Flissie bamboo vs Calvin Klein cotton boxer shorts
2. Avoid anything that digs in
A waistband that feels fine at 8am can feel unbearable by hour seven of a flight.
Long-haul travel often involves sitting still, eating at odd times, water retention and bloating. Tight waistbands and narrow elastic can quickly become uncomfortable.
Look for underwear with a soft, flexible waistband that stays in place without squeezing. It should feel secure, not restrictive.
3. Think about thigh chafing before it starts
Thigh chafing is one of the biggest travel outfit problems, especially if you are wearing dresses, skirts, shorts or wide-leg trousers in warm weather.
It usually happens when heat, sweat and movement create friction between the thighs. A long airport walk, a rush to the gate or a full day exploring after landing can be enough to trigger it.
Longer-leg underwear creates a soft fabric barrier between the thighs, helping reduce friction before it becomes painful.
If this is something you struggle with in summer, read: How to stop thigh chafing in summer
4. Pick a leg length that suits your outfit
Travel underwear should work with your clothes, not fight against them.
Flissie comes in two lengths:
| Flissie length | Best for |
| 6-inch | Dresses, skirts, lighter coverage, everyday travel outfits |
| 9-inch | More thigh coverage, stronger anti-chafing support, long travel days |
If you mainly want underwear that feels soft and comfortable under dresses or loose trousers, the 6-inch length may be enough.
If chafing is your main concern, or you worry about fabric rolling up, the 9-inch length gives more coverage.
5. Choose underwear that can be washed easily
Travel underwear should be easy to care for, especially if you pack light.
Bamboo underwear needs gentle washing to keep it soft and in shape. A cool wash and air drying are usually best. Avoid tumble drying if you want your underwear to last longer.
Read our full care guide here: How to care for bamboo underwear
The case for bamboo underwear on long journeys
Bamboo underwear works well for travel because it solves several common comfort problems at once.
It is soft enough for all-day wear, breathable enough for warm destinations and smooth enough to sit comfortably under different outfits.
Why bamboo works well for travel
| Travel problem | How bamboo boxer shorts help |
| Sitting for hours | Soft fabric and a flexible fit feel more comfortable against the skin |
| Warm airports and destinations | Breathable fabric helps you feel fresher |
| Thigh rubbing | Longer-leg coverage helps reduce friction |
| Tight travel outfits | Smooth fabric sits neatly under leggings, linen trousers and dresses |
| Packing light | Multi-packs make it easier to plan underwear for several days |
| Sensitive skin | Smooth fabric can feel gentler than rougher seams or stiff cotton |
Flissie boxer shorts are not shapewear. They are not designed to squeeze your body or create compression. They are designed to feel like comfortable underwear that gives you enough coverage to move freely.
That is what makes them practical for long flights, holidays, city breaks, walking-heavy trips and warm-weather travel.
Our top picks: the best underwear for long-haul travel
There are different types of travel underwear, and the best option depends on your trip, outfit and personal comfort needs.
Here is how they compare.
| Underwear type | Best for | Watch-outs |
| Bamboo boxer shorts | Long flights, chafing prevention, dresses, everyday travel comfort | Choose the right length for your outfit |
| Seamless briefs | Minimal lines under tight clothes | Less thigh coverage |
| Cotton knickers | Familiar everyday wear | Can hold moisture and may bunch on long travel days |
| Compression shorts | Support, sport or recovery wear | Can feel too tight for all-day travel |
| Synthetic sports underwear | Hiking, workouts, active trips | May feel less soft for long sitting periods |
| Period underwear | Travel during your period or backup protection | Usually more specific to cycle needs |
Best overall: Flissie bamboo women’s boxer shorts
Flissie bamboo boxer shorts are a strong all-round choice for travel because they combine softness, breathability, flexible fit and thigh coverage.
They are especially useful if you want underwear that works under:
- Airport outfits
- Dresses
- Linen trousers
- Wide-leg trousers
- Leggings
- Holiday outfits
- Work travel clothes
- Long walking days
Flissie is available in UK sizes 8–30, with 6-inch and 9-inch lengths.
The 6-inch length is ideal if you want lighter mid-thigh coverage. The 9-inch length is best if you want extra anti-chafing protection or have had issues with shorter underwear rolling up.
Shop Flissie bamboo boxer shorts
Best for dresses and summer holidays: 6-inch bamboo boxers
If you are packing dresses, skirts or loose summer outfits, the 6-inch length is an easy choice. It gives you the comfort of boxer shorts without feeling too long or bulky under lighter clothing.
This is the pair to pack for:
- Beach holidays
- City breaks
- Summer dresses
- Airport-to-hotel travel days
- Everyday sightseeing outfits
Best for chafing protection: 9-inch bamboo boxers
If you know your thighs rub on long walking days, go for the 9-inch option.
The longer leg gives more coverage, which helps create a barrier between the thighs. That can make a big difference when you are walking through airports, rushing between terminals or exploring in the heat.
This is the pair to pack for:
- Long-haul flights
- Hot destinations
- Walking-heavy holidays
- Theme parks
- City breaks
- Travel days where you will not change for hours
What underwear should you avoid on a long-haul flight?
Some underwear is fine for short wear but not ideal for long flights.
Avoid very tight shapewear
Shapewear can look smooth under clothes, but it is not always comfortable for travel. Sitting for hours in tight compression can feel restrictive, especially when you bloat or try to sleep.
If you want comfort, choose soft coverage over compression.
Avoid scratchy lace or stiff seams
Pretty underwear has its place, but long flights are not always the moment. Scratchy trims, lace edges and raised seams can become irritating after hours of sitting.
Avoid anything that rolls up
Underwear that rolls up becomes annoying fast. If you are pulling it down before you have even boarded, it is probably not the pair for a long-haul flight.
Avoid brand-new underwear you have never worn
Do not test new underwear for the first time on travel day. Wear it once before your trip so you know the fit, waistband and leg length work for you.
How many pairs of underwear should you pack for a long trip?
A simple rule is:
One pair per day, plus two or three extra.
For longer holidays, a multi-pack is usually easier and more practical. It means you are not relying on hotel laundry or trying to hand-wash underwear every night.
Travel underwear packing guide
| Trip length | Suggested underwear packing |
| Weekend trip | 3–4 pairs |
| 5-day holiday | 6–7 pairs |
| 7-day holiday | 8–10 pairs |
| 10–14 day trip | 10–14 pairs, or fewer if washing mid-trip |
| Long backpacking trip | 5–7 quick-drying pairs and a laundry plan |
If you are travelling somewhere hot, packing a few extra pairs is worth it. You may want to change after a long flight, after a beach day or before going out in the evening.
How to pack underwear for a long trip
Underwear is small, but packing it properly makes travel easier.
1. Pack your flight pair separately
Choose the pair you will wear on the plane before travel day. Do not leave it to the morning of the flight.
For long-haul travel, choose the softest and most reliable pair you own.
2. Keep one spare pair in hand luggage
Always pack one spare pair in your cabin bag. If your checked luggage is delayed, or if you want to freshen up after the flight, you will be glad you have it.
3. Use a packing cube or small pouch
Keep underwear together in a pouch or cube so it is easy to find. This also helps separate clean and worn items during the trip.
4. Pack by outfit
If you know you are wearing dresses on certain days, pack longer-leg underwear for those outfits. If you are doing a long walking day, save your best anti-chafing pair for then.
5. Wash gently if needed
If you need to wash bamboo underwear while travelling, use cool water, avoid harsh detergents and air dry. Do not tumble dry.
For more tips, read: How to wash clothes and underwear more sustainably
Best underwear for travel: final verdict
The best underwear for travel is the pair that lets you forget about it.
For long-haul flights, that usually means soft fabric, breathable comfort, a waistband that does not dig in and enough coverage to stop rubbing before it starts.
Flissie bamboo boxer shorts are designed for exactly that: everyday comfort, anti-chafing coverage and a smooth fit that works under real travel outfits.
Choose the 6-inch length if you want lighter everyday coverage under dresses and summer outfits.
Choose the 9-inch length if you want more protection against thigh chafing on long flights, hot holidays and walking-heavy trips.
Either way, they are a practical travel essential that earns its place in your suitcase.
Shop Flissie bamboo boxer shorts — ideal for travel
FAQs: best underwear for travel
What is the best underwear for long-haul flights?
The best underwear for long-haul flights is soft, breathable and designed to stay in place. Longer-leg bamboo boxer shorts are a good choice because they feel smooth against the skin and help reduce thigh friction during long periods of sitting and walking.
Is bamboo underwear good for travel?
Yes, bamboo underwear is a strong choice for travel because it feels soft, breathable and comfortable for long wear. It is especially useful for warm destinations, long journeys and outfits where you want gentle coverage without tight compression.
What underwear should women wear on a plane?
Women should wear underwear that feels soft, flexible and non-restrictive on a plane. Avoid tight shapewear, scratchy lace or anything that digs in when sitting. Bamboo boxer shorts, seamless underwear or soft briefs are all better options than stiff or tight styles.
How do I stop chafing on a long flight?
To help stop chafing on a long flight, wear longer-leg underwear that creates a soft barrier between the thighs. Breathable, moisture-wicking fabrics can also help you stay more comfortable. If thigh chafing is a regular issue, choose anti-chafing travel underwear rather than short briefs.
Are boxer shorts good for travel?
Yes, boxer shorts can be very good for travel, especially if they are designed for women with a stay-put fit. Longer-leg boxer shorts help reduce rubbing under dresses, skirts, loose trousers and travel outfits.
Should I wear shapewear on a long flight?
Shapewear is not usually the most comfortable option for a long flight. It can feel restrictive when sitting for several hours or when your body bloats during travel. For comfort, choose soft, breathable underwear instead.
How many pairs of underwear should I pack for a holiday?
Pack one pair of underwear for each day of your trip, plus two or three extra. If you are travelling somewhere hot, doing lots of walking or changing outfits often, extra pairs are helpful.
What length of Flissie boxers should I choose for travel?
Choose Flissie 6-inch boxers if you want lighter coverage under dresses, skirts and everyday outfits. Choose Flissie 9-inch boxers if you want more thigh coverage and stronger anti-chafing support for long flights, hot holidays and walking-heavy days.
Can I wear Flissie boxer shorts under dresses?
Yes, Flissie boxer shorts are designed to sit smoothly under dresses and help reduce thigh rubbing. The 6-inch length is a good everyday option, while the 9-inch length gives extra coverage.
Are Flissie boxers suitable for sensitive skin?
Flissie boxers are made from ultra-soft bamboo viscose and designed to feel gentle against the skin. They are a good option if you dislike scratchy seams, stiff fabrics or tight waistbands.
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