Jack and Sage Acquires Sustainable Apparel Brand Kastlfel

Expanding Premium Logo Wear Across National Parks and Ski Resorts

Published on Mar. 6, 2026

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Jack and Sage, a Colorado-based outdoor apparel company, has acquired 100% of the assets, intellectual property, and inventory of sustainable apparel brand Kastlfel. The transaction includes a strategic partnership with Kastlfel's parent company, Ecocentric Brands, ensuring continued screen print decoration in Denver under the same water-based, sustainability-driven standards.

Why it matters

The acquisition strengthens Jack and Sage's offering to national park, ski resort, and specialty outdoor retail partners, allowing the combined company to deliver a full suite of apparel and accessories with premium custom artwork capabilities and water-based sustainable screen printing.

The details

Jack and Sage has established itself as a premium brand within national parks, ski resorts, and outdoor destinations. With the addition of Kastlfel, the company enters the broader basics and logo wear segment, including sustainable tees, headwear, and knitwear, while maintaining its premium positioning. Kastlfel products are made exclusively from 100% sustainable materials, including organic cotton, recycled cotton, and recycled polyester, with every factory and production facility certified to stringent global standards.

  • The transaction was announced on March 5, 2026.

The players

Jack and Sage

A Colorado-based outdoor apparel company known for elevated design and premium destination retail programs.

Kastlfel

A sustainable apparel brand that was acquired by Jack and Sage.

Ecocentric Brands

The parent company of Kastlfel, which has a strategic partnership with Jack and Sage to ensure continued screen print decoration in Denver under the same water-based, sustainability-driven standards.

Alex Biegler

The Founder and CEO of Jack and Sage.

Marc Conner

The COO of Jack and Sage.

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What they’re saying

“This acquisition is a meaningful investment into sustainability and product expansion. Kastlfel has built a best-in-class reputation for responsible manufacturing and trusted relationships with world-class outdoor retailers. By integrating their platform into Jack and Sage, we're able to expand into the sustainable basics market while staying true to our elevated design DNA.”

— Alex Biegler, Founder and CEO of Jack and Sage (news-press.com)

“It's not enough to simply claim sustainable materials. Consumers want proof. Third-party certifications like GRS and OCS verify that our finished products contain the sustainable fibers we start with. Every step of the process is certified and transparent.”

— Marc Conner, COO of Jack and Sage (news-press.com)

“Our goal is simple. Deliver unmatched service, design, and product quality while raising the bar for sustainable logo wear.”

— Alex Biegler, Founder and CEO of Jack and Sage (news-press.com)

What’s next

Over the next 12–24 months, the product assortment will expand from tees into hoodies, crew necks, beanies, and caps.

The takeaway

The acquisition of Kastlfel by Jack and Sage strengthens the company's position in the premium outdoor apparel market, allowing it to expand its sustainable product offerings while maintaining its elevated design and quality standards.