ABOUT US

We’re Chilly and Stephanie, best friends for over 20 years. We grew up together by the sea, spending our days sailing, diving, and dreaming of one day creating something together.

Kosaai means “sand island” a tribute to our home, Koh Samui. The island’s sandy soil has long shaped its identity, nurturing the coconut groves that made it renowned for coconut farming. Just as the sandy soil is at the heart of the island’s past, Kosaai is rooted in this connection to place, nature, and heritage.

Kosaai the label was born from our shared love of the ocean and desire to create pieces that feel as effortless and free-spirited as the lifestyle we grew up in. Our goal is to create swimwear that celebrates every body, respects the planet, and embodies the laid-back, salt-soaked essence of coastal living.

This is our first venture into fashion, and we’re learning and evolving every step of the way. We’re committed to improving, listening to our community, and growing this brand into something meaningful not just for us, but for everyone who shares this passion.