Behind a Brand Extension: How a Sweatshirt Raised Over $1 Million on Kickstarter Flint and Tinder's founder shares tips on how he successfully branched out with a new product -- and you can, too.

By Catherine Clifford

Opinions expressed by BIZ Experiences contributors are their own.

Brand extensions can be challenging to pull off, particularly for a relatively new company. But one New York startup found blockbuster early success when it branched out from inner-wears to outer-wears.

In March, New York City men's underwear startup Flint and Tinder decided to add a sweatshirt to its menu of offerings. Founder and chief executive Jake Bronstein says he thought a hoodie would be the ideal item of clothing to express the rugged durability that the brand aims to represent. "It keeps you warm. It wraps you up. And the good ones, you wear until they fall apart," he says. "But it's not like jeans where eventually you'll skin the knees. A well-made hoodie doesn't have to fall apart at all." It's made in the U.S. and comes with a lifetime mending guarantee.

Related: Small Companies, Big Hearts: Leading Social BIZ Experiencess

Jake Bronstein, founder of Flint and Tinder, wearing the 10-year hoodie.
Jake Bronstein, founder of Flint and Tinder, wearing the 10-Year Hoodie.

Bronstein touched a nerve with consumers. The unisex sweatshirt, called the 10-Year Hoodie, raised over $1 million on Kickstarter, becoming the most successful fashion item on the crowdfunding platform since it was founded in 2009, according to Kickstarter's list of record-setting fashion campaigns.

The sweatshirt will retail for $90 when it's available for sale. Backers of the Kickstarter campaign will have access to the first sweatshirts starting in August. Once those orders have shipped, the hoodie will be available for sale on Flint and Tinder's website in November.

Related: Tips on How to Make Your Supply Chain More Environmentally Friendly

Including money raised on Kickstarter for the hoodie, the company has earned more than $2 million in gross revenue in just seven months of operation, says Bronstein. Prior to launching Flint and Tinder in October last year, the Philadelphia native co-founded a company that sold a magnetic desk-top toy called Buckyballs, which he left to start Flint and Tinder. A year after Bronstein left Buckyballs, the company closed for reasons unrelated to his departure.

Knowing when to add another item to your existing product line can be like trying to nail Jell-O to a wall. Here is what Bronstein learned from extending his brand, which may help guide you through the process.

Flint and Tinder
Flint and Tinder's products are manufactured in the U.S.

1. Build a following first.
When the made-in-America men's underwear brand launched online last October, Bronstein was hoping underwear sales would reach $75,000. Instead, sales soared quickly to more than $200,000. Bronstein says that even he was surprised by the demand and enthusiasm from customers right out of the gate. But having a loyal fan base for their brand helped Flint and Tinder garner support for a new product. "You need to get good at one thing before you can expand," says Bronstein.

Related: Crowdfunding Industry On Fire: Trends to Watch

2. Make sure the product matches your message.
"While we are an underwear company, we are really a brand," says Bronstein, whose company showcases the value of products that are made in America. For Bronstein, his brand stands for durability, and the company markets its underwear as made to last "through a lifetime of washing." To reinforce that message with outerwear, he included a lifetime guarantee to mend the sweatshirts.

3. Listen to your customers.
One way to know it's an appropriate time to expand your product line is to solicit feedback from the people who are already spending money on your products. Bronstein says, "We get so many emails from people saying: 'You should make this.' 'You should do that.' 'Oh my god, when you do this, I am going to buy a million.' "

4. Expand strategically.
"You need to be serious and realistic about what you are trying to accomplish and make sure you are not distracting yourself," says Bronstein. Enthusiastic BIZ Experiencess can easily get excited about new ideas. For example, just because you sell air conditioners, which cool a person down in summer, doesn't mean it makes sense to start selling swimming pools, he says. "It takes a little bit of soul searching to know what you are trying to do and why."

Related: Dominate Your Industry: How to Become the Best in Your Field

Have you added a product to your lineup that was particularly well received by your customer base? If so, how did you know it was the right time? Leave a note below and let us know.

Catherine Clifford

Senior BIZ Experiencesship Writer at CNBC

Catherine Clifford is senior BIZ Experiencesship writer at CNBC. She was formerly a senior writer at BIZ Experiences.com, the small business reporter at CNNMoney and an assistant in the New York bureau for CNN. Clifford attended Columbia University where she earned a bachelor's degree. She lives in Brooklyn, N.Y. You can follow her on Twitter at @CatClifford.

Want to be an BIZ Experiences Leadership Network contributor? Apply now to join.

Starting a Business

These Brothers Started a Business to Improve an Everyday Task. They Made Their First Products in the Garage — Now They've Raised Over $100 Million.

Coulter and Trent Lewis had an early research breakthrough that helped them solve for the right problem.

Growing a Business

Struggling to Explain What You Sell? This Beverage Brand Was Too — Until It Tried This 4-Step Fix

Rebranding can be a complicated process, but it doesn't have to be. Here's how one beverage company fixed its messaging problem in a few key steps.

Franchise

How to Prepare Your Business — And Yourself — For a Smooth Exit

After decades of building your business, turning it over to someone else can be emotional. But with the right mindset and a strong plan, it can also be your proudest moment.

Franchise

10 No-Office-Required Businesses You Can Start for as Little as $5,000

With strong Franchise 500 rankings and investment levels starting under $5,000, these brands are ready for new owners to hit the ground running.

Business Ideas

70 Small Business Ideas to Start in 2025

We put together a list of the best, most profitable small business ideas for BIZ Experiencess to pursue in 2025.