This post is brought to you by Totallee, maker of ultra-slim iPhone cases.

When you drop coin for a new iPhone, the natural instinct is to protect it properly. The preferred way to do that is with quality, long-lasting leather. But a nice leather case adds a steep premium to an already pricey purchase.

SAN FRANCISCO — Teddy Winthrop is into leather. Like, way into it. In the year since he launched Edward Field, his high-end iPhone wallet case company, he’s been obsessing over ways to make his leather cases sleeker, more functional and more straight-up appealing to the humans who use them.

“It’s weird,” he told Cult of Mac while discussing the mission of his company, which launches a new line of products today. “I never thought I’d be passionate about wallets.”