Pioneering underwear brand Step One announces a period underwear line with a new kind of innovation.For the first time, women can experience period protection that feels just like their favourite Step One underwear: breathable, bulk-free bamboo viscose, and featuring a 2-layer absorbent core.
Traditional period underwear is often bulky, featuring multiple layers of terry cloth that lack comfort and breathability. Step One’s innovative design changes the game with an integrated absorbent knit, which combines absorbency and waterproofing in a single layer.
The result: protective underwear with just two functional layers, plus a bamboo outer layer, making it thinner, faster-drying, and more breathable, without sacrificing protection.
How it works:
Top Layer: Naturally Hygienic Wool Jersey.
Wool naturally wicks moisture, regulates temperature and manages odour. This layer sits directly against the skin, keeping the wearer dry and comfortable, even on heavy days.
Second Layer: Absorbent Core Knit with Leak-Lock Barrier
A polyester/cotton knit bonded with a TPU membrane draws fluid in, distributes it evenly, and locks it away, creating a slim yet leak-proof shield.
Outer Layer: Durable Bamboo Outer Shell
Soft, stretchy and familiar in fit, this lightweight layer is 95% certified viscose made from bamboo and 5% elastane. It’s breathable, durable, and designed to withstand frequent washes.
The Range:
Step One Period Thong
Your barely-there option for light flow days, spotting, or as a backup. All the comfort of your favourite thong, only smarter, with integrated absorbency that keeps you dry and confident.
Period Bikini Brief
Your everyday go-to. Slim, supportive, and designed to look and feel like Step One’s best-selling Bikini Briefs, with the capacity to absorb up to, without the bulk. Perfect for work, weekends, and workouts, without the bulk. Perfect for work, weekends and workouts, without the bulk.
Period Full Brief
Built for bigger days and nights and nights. With the same smooth silhouette as the moderate version, this style extends the absorbent panel further through the back for extra protection while staying slim and comfortable. Ideal for overnight comfort or heavier flow days, it’s slim protection without compromise. Ideal for overnight comfort or heavier flow days, it’s slim protection without compromise.
