Pregnancy changes your body in ways that can make everyday underwear suddenly feel uncomfortable. Waistbands begin to dig in, thighs may rub more than usual and fabrics that once felt fine can become irritating against sensitive skin.
Our women’s bamboo boxer shorts are designed with comfort at their core, making them a soft, breathable and practical choice throughout pregnancy and into postpartum recovery.
Soft, breathable bamboo fabric
Hormonal changes and increased blood flow can leave you feeling warmer during pregnancy. Flissie boxer shorts are made from 95% Tanboocel bamboo viscose and 5% elastane, creating a beautifully soft and breathable fabric that allows air to circulate.
The lightweight material helps move moisture away from the skin, helping you feel fresher and more comfortable throughout the day. It feels soft from the first wear, without the stiffness of fabrics that need time to be broken in.
You can learn more about the fabric and how it is produced on our Sustainability page.
A wide waistband that feels supportive, not restrictive
As your bump grows, tight or narrow waistbands can quickly become uncomfortable. Flissie boxer shorts feature a wide, soft waistband designed to sit smoothly against your body without digging in.
The flexible fabric moves with your changing shape, while the waistband can be positioned beneath your bump if that feels more comfortable as your pregnancy progresses.
Every pregnancy body is different, so we recommend checking our Flissie size guide and sizing up if you are between sizes or would prefer some additional room.
Longer legs to help prevent thigh chafing
Changes to your body, water retention and the way you walk during pregnancy can make thigh rubbing more noticeable. Flissie boxer shorts are available with a choice of 6-inch or 9-inch legs, providing a smooth layer of fabric between your thighs to help reduce skin-on-skin friction.
Their longer length makes them particularly comfortable beneath dresses and skirts, especially during warmer weather when chafing can become more uncomfortable.
Choose the 6-inch length for comfortable everyday coverage or the 9-inch style if you prefer extra protection further down your thighs. You can compare both options when you shop Flissie boxer shorts.
Smooth comfort for more sensitive days
Your skin may feel more sensitive during pregnancy, making seams, labels and tight clothing much more noticeable. Flissie boxer shorts are designed to feel smooth and gentle against the body, with soft fabric and a comfortable fit that helps minimise rubbing and irritation.
They can be worn beneath everyday clothes, maternity wear, dresses or simply on their own while relaxing at home.
Comfortable during pregnancy and after birth
Flissie boxer shorts aren’t only useful while your bump is growing. Their soft, flexible fit can also make them a comfortable underwear option after giving birth, when your body may still feel tender and restrictive clothing is the last thing you want.
They provide gentle coverage without tight shaping or compression, making them an option you can continue wearing long after pregnancy.
If you have had a Caesarean birth, always follow the advice of your midwife or healthcare professional about clothing and underwear worn near your incision.
Real experiences from pregnant Flissie customers
Pregnant customers have already shared how Flissie boxer shorts have helped them feel more comfortable as their bodies have changed.
One customer chose a larger size to accommodate her pregnancy bump and described the 9-inch boxers as silky-soft, breathable and comfortable enough to wear throughout pregnancy and postpartum. Another said she wanted underwear that felt comfortable while still looking nice and found that Flissie gave her exactly that.
You can find more verified customer experiences on our Flissie size guide and reviews page.
Choosing the right size during pregnancy
Flissie boxer shorts are available in UK sizes 8–30. During pregnancy, comfort should always come before sticking to your usual size.
Consider sizing up if:
- You are between two sizes
- Your current underwear feels restrictive
- You would like more room for your changing body
- You prefer a more relaxed fit around your bump
- You want to continue wearing them later into your pregnancy
Your first size swap is free, giving you the reassurance of finding the fit that feels right for you.
Caring for your bamboo underwear
Looking after your Flissie boxer shorts correctly will help preserve their softness, shape and breathability.
Wash them at 30°C or below, avoid fabric softener and allow them to air-dry wherever possible. For more advice, read our complete guide on how to wash bamboo underwear.
Pregnancy underwear that still feels like you
Pregnancy underwear doesn’t have to feel clinical or temporary. Flissie boxer shorts are available in a range of flattering colours and are designed for real bodies at every stage of life.
Soft, breathable and made with a longer leg, they offer everyday comfort as your body changes—from the early weeks of pregnancy to postpartum recovery and beyond.
Pregnancy underwear FAQs
Are Flissie boxer shorts suitable during pregnancy?
Flissie boxer shorts can be a comfortable choice during pregnancy because they are made from soft, breathable bamboo viscose and have a flexible fit, wide waistband and longer legs.
Should I size up during pregnancy?
You may prefer to size up as your body changes, particularly if you are between sizes or want more room around your bump. Check the Flissie size guide before ordering.
Which leg length should I choose?
The 6-inch style provides everyday coverage and works well beneath shorter dresses and skirts. The 9-inch style offers additional thigh coverage and may be preferable if chafing is a particular concern.
Can I wear Flissie boxer shorts after giving birth?
Their soft fabric and non-restrictive fit can make them comfortable during postpartum recovery. If you have had a Caesarean birth or experienced complications, ask your healthcare professional what type of underwear is appropriate for you.
How should I wash bamboo boxer shorts?
Wash at 30°C or below, avoid fabric softener and air-dry to help preserve the fabric’s softness and breathability. Read our bamboo underwear care guide for full instructions.
Discover softer, more breathable comfort throughout pregnancy. Shop Flissie women’s bamboo boxer shorts →
