Rothy's is known for sustainable shoes made from recycled plastic bottles. But that's not actually what they built.

In this episode, Aaron and co-host Barb Almeida (Superbloom Insights) break down the real story behind Rothy's — a programmable knitting system that two outsiders spent four years and $2 million developing before they ever sold a single pair of shoes.

They cover why footwear is one of the most waste-intensive consumer categories, how Rothy's designed waste out of the manufacturing process before they designed the product, why Nike never sued them despite using similar technology, and what Alpargatas was actually buying when they put $475M into a 49.9% stake in 2021.

If you're building a physical product brand — or thinking about what makes a manufacturing-led business defensible — this one is worth your attention.

Topics covered:

Why footwear has more manufacturing waste than almost any other consumer category

How Rothy's programmable knitting system works

The four-year, $2M development period before launch

The 2012 DTC playbook — and why Rothy's did the opposite

Rothy's vs. Nike Flyknit: same technology, completely different objective

Goldman Sachs and Alpargatas: what they were actually buying

What founders can take from a brand that built the system before the product

The Shopify origin story (tidbits segment)

Tariff refund update: $20B paid out so far

Ecommerce on Tap goes deep on the operational and commercial story behind specific consumer brands and categories. Each season covers one industry. This season: footwear.