Elevated Activewear

Addison Bay was born from the idea that activewear should go beyond the gym and where fashion forward doesn’t mean less function. We make it easier to get dressed every day by offering the modern wardrobe for the modern woman.

Designed for the girl on the go, produced by girls on the go.

Model 1 is wearing College Crewneck in Light Grey layered over Assembly Button Down in Navy and Everyday Legging in Navy. Model 2 is wearing College Crewneck in Light Grey layered over Palm Beach Dress in Navy / White Stripe. Model 3 is wearing College Crewneck in Light Grey with Everyday Skort in Navy.

Girl on the Go

Fashion and function don’t have to be mutually exclusive. We’ve taken our own experiences as on-the-go women to develop the everyday wardrobe – designed to take you from 7am to 7pm.

AB Founder Marguerite playing on a tennis court with her daughter.


At ABHQ, we have designed our collections to be multi-generational, worn at any age and in any stage of life.

Model wears Everyday Pullover in Beverly Blue layered over Everyday Long Sleeve in Beverly Blue Stripe, with Addison Bay Embroidered Hat in Navy.

Style & Quality

The AB girl is the ultimate multi-tasker. When it comes to her wardrobe, the AB girl loves activewear that marries functional needs with ready-to-wear style.

Meet Founder & CEO, Marguerite

Addison Bay was founded by Philadelphia-based entrepreneur, Marguerite Adzick. After her past as a collegiate athlete merged with a career in the fashion industry, Marguerite recognized a need in the industry for elevated activewear. The problem she was trying to solve? Finding activewear that was elevated yet comfortable.

Polaroid snapshot of the Addison Bay team on Day 1 in business.

How it Started

Addison Bay launched in September of 2018. Marguerite resigned from a job she loved – at six months pregnant! – to start Addison Bay, with the idea that elevated activewear was here to stay. Fast forward to today, Addison Bay is an omnichannel company selling online, at two retail locations and through several wholesale partners.

Story Behind the Name

Marguerite was living on Addison Street in Philadelphia during the inception of the company – staying up late sitting at her kitchen counter writing the business plan and building the groundwork of the company you know today. Bay comes from swimming in the bay in Avalon, New Jersey which evokes the active lifestyle piece of AB.