About

Built by someone who has sat in the buyer's chair.

The RetailLAB is Michael Lewis II: 25 years in retail, $2 billion in merchandise sales, and the author of Retail IS Hard. The platform is new. The judgment behind it is not.

Michael Lewis II

Michael learned retail in the buyer's chair at City Sports, one of the most respected independent sporting goods retailers in the country. Those were the years that produced the touchscreen gloves, the hot markets, and the hard lessons that fill his book. A stint at Nathan Sports put him on the other side of the table: developing product alongside Nike and selling into Dick's Sporting Goods, The Sports Authority, Big 5, Scheels, and Academy Sports. And for the past decade he has worked independently, consulting for brands and retailers from boutique Shopify labels to national chains, selling NCAA and NBA licensed programs into Walmart and Target along with sleepwear and lounge, and most recently implementing an AI-powered allocation system for a 400-store specialty retailer doing close to $300 million.

The RetailLAB, a product of Sustainable Souls, Inc., is that career turned into a platform. After identifying $153,000 in lost sales on a single wool jacket, rebuilding a $1 million category from a markdown mistake, and uncovering $2.3 million in missed revenue on a single size across an assortment, Michael built the tool he wished he'd had all along: daily inventory tracking, lost revenue calculated automatically, and the buying recommendations that actually move the needle. See the full history on the track record page.

Analysis + Creativity + Relentless Execution = Results

The equation hasn't changed in 25 years. Only the tools have.

What Michael stands for

Stay curious. Keep evolving. Treat people like people. Lead with integrity. Results matter.

Michael and his son in front of the Louvre pyramid in Paris
Michael and his son in Paris. The results matter because the people behind them do.

What we believe

  • Daily inventory snapshots change everything. Weekly or monthly reporting hides stockouts, restocks, and velocity shifts that happen in days, not weeks.
  • Lost sales are real, measurable, and actionable. When a product sells out, the demand signal goes quiet. But with the right data, you can calculate exactly what you missed, and plan better next time.
  • Variant-level visibility is non-negotiable. Style-level summaries hide the real story. Size, color, and fit-level data is where the profit lives (and dies).
  • Data finds the story. A merchant writes the ending. The math was never the hard part. Pairing it with the right product, the right placement, and a team willing to act. That's the work.

Company

Legal Name: Sustainable Souls, Inc.

Product: The RetailLAB

Website: retailishard.ai

Shopify Partner ID: 4818628

Contact: mlewis@sustainablesouls.com

See what The RetailLAB can do for you today!