The Best Period Pants for Every Flow

Our range of period underwear has something for every flow, whether you need light just-in-case protection or something for heavier days. You can wear leak-proof underwear by itself on the lighter days of your cycle, or in tandem with a tampon or menstrual cup to give you added peace of mind when your flow is heavy. Period knickers are also a great choice for coping with post-birth bleeding and often more comfortable than wearing a bulky maternity pad. And, as another plus, they look and feel just like your everyday underwear, too.

“Our moderate-absorbency knickers hold up to 12ml of moisture, the same as four light tampons or two regular towels, and the high absorbency holds up to 20ml of moisture – which is almost double an overnight pad or super tampon,” says Mhairi Leach, M&S's technology lead (lingerie). These low-rise bikini briefs combine style and function with a high level of absorbency to give you the confidence you need to get on with your day.

You can wash period pants with the rest of your everyday laundry (up to 40 degrees) either in the machine or by hand. Line dry afterwards for added eco points. “We suggest a quick rinse and then pop them in the washing machine on a delicate wash cycle. Don’t use fabric conditioner as this can affect the absorption,” says Mhairi. Our new and improved range of period knickers comes in a choice of colours and styles, including thongs, full briefs and shorts and you can also buy multi-packs of pants in a mixture of absorbencies, so you’ll always have a pair to suit your needs. This multi-pack of everyday period knickers in comfortable cotton modal is a great starting point for your new regime, with three pairs in a flattering high-leg design. All our cotton is responsibly sourced.