Firstly Email Formats

About Firstly

Firstly exists to support you — from the very first layer up. We design intimate essentials that celebrate women at every stage of life, combining breathable, sustainable materials with thoughtful, problem-solving design. It all started with a simple question: Why is the most basic layer of clothing so often an afterthought? Founder Rebecca Mazzara set out to create underwear and tanks that prioritize health and comfort without sacrificing personality or joy. Firstly products are made with natural fibers like sustainable MicroModal and 100% organic cotton gussets to support vaginal health and prevent irritation. Every detail is designed with intention: Wider gussets to prevent frontal wedgies (“lip-slip”) Full tummy coverage with no digging elastic Gentle fabrics ideal for pregnancy, postpartum, or post-surgery recovery Wedgie-proof boyshorts, curvy-friendly thongs, and double-lined tanks that can replace your bra Our mission goes beyond products. Firstly brings women together — mothers, daughters, and friends — through shared values of health, comfort, and celebration. We see a future where every woman feels understood and supported, starting with her very first layer. Based in San Francisco, with fulfillment in Canada and the US, Firstly ships internationally and partners with certified, zero-waste manufacturers. Because when the first thing you put on each day feels right, everything else flows from there.

View contact profiles from Firstly