Purpose & products

We started Sisao out of a necessity: we wanted to create essentials for everyday that are fun to wear (almost) forever. Sustainability is really important to us, and since underwear is really not likely to be passed on or shared, it needs to last. We make sure to use organic cotton (with a share of elastane so they hold their shape) and produce sustainably in Portugal, working with small family-owned manufacturers. We pack and ship plastic free, using recycled and recyclable materials whenever possible and are always working on reducing waste in every step of the production process.

Our signiture products

High Rise Panties

Our signature high rise panties are the foundation of your outfit you always needed but never found - until now. They’re comfortable basics for everyday that form part of your wardrobe and fit your style. They’re flattering to every body type and fun to mix and match as well. Made sustainably in Portugal from a mix of 92% GOTS certified organic cotton and 8% elastane so they’re soft to the touch but hold their shape.

Basic Bra Top

Our basic bra top is the foundation of your outfit you always needed but never found - until now. It’s a comfortable basic for everyday that forms part of your wardrobe and fits your style. It’s flattering to every body type and fun to mix and match as well. Made sustainably in Portugal from a mix of 92% GOTS certified organic cotton and 8% elastane so it’s soft to the touch but holds its shape.