After spending much of 2015 writing and recording, an invitation to join Carrie Underwood on her 2016 tour has inspired the Swon Brothers to work harder than ever before.

"We just want to get it right. We're not in a rush. Once it's out, it's out. That's kind of our take on it," Colton Swon tells The Boot. "Fans deserve our best. People have supported us by buying records, showing up to shows, and they’re giving us their best, so they deserve our best in return. And I think our biggest thing on this record is, our sound is really developing."

Adds Zach Swon, "We’ve been writing a lot, and it seems like once we think we’re ready to finalize everything, we write another song we like better."

The brothers write most of their songs together, sometimes along with other writers. It's a luxury that they didn't have with their freshman album, which was released one year after their third-place finish during Season 4 of The Voice.

"We’re not opposed to outside songs," Zach Swon says. "The first record, we didn’t have a lot of time to be creative. We came right off the show. We didn’t have time to try and write the whole record in the time that we’ve had.

"In the last year and a half, we’ve learned so much from co-writing. I think it’s coming out a lot more genuine. We’re pumped about it," he continues. "We’ve done a lot in my home studio, so if we’re not in a studio in Nashville, we’re editing at home. We’re working day in and day out, getting it ready."

In 2013, the Swon Brothers landed in the Top 15 with their debut single, "Later On," which comes from their eponymous freshman album. And now, as they put the finishing touches on their sophomore record, the siblings are hoping to find their way back on the charts again.

"I think radio is necessary to become a superstar. I think you definitely need radio," Colton Swon notes. "We’re grateful for radio and all the chances that it has given us. But, it is hard. I think everybody’s evolving constantly, and I think country music in particular has become a very broad spectrum, which is good."

The Swons admit that there are challenges to being a duo who spend time together on and off the road, but in the end, they agree that it's their differences that make them stronger.

"We're brothers. We have our fights," Zach Swon concedes. "It’s hard, because you’re running a business together, and it’s, like, 50-50 everything, and we disagree on everything, it seems like. But at the end of the day, I think it’s very important that we just stay brothers first, before business, before music. That’s what we’ve always said. If it gets in the way -- and it almost has a few times -- that’s when we’re, like, we’ll be done with it, because that’s the most important thing out here. No job is worth losing a brother. Or even a dream, it’s not worth losing your best friend and brother."

More than anything, the Swon Brothers are eager to continue to mature as artists and to show their fans what they are capable of as musicians.

"You’re always growing as an artist, and you’re always kind of honing in on what people respond to the most and what is your niche in this industry," Colton Swon says. "We always try to grow and figure that out, but I really think that we’ve really hit something special. It’s a sound that really fits us and who we are. And nothing to take away from the last record, it’s just -- I think this record is so much more on point with our sound, the feel, everything people like about what we do. We listen to what people are telling us out on the road and what the response is, and you can hone in on that."

A list of all of the Swon Brothers' upcoming tour dates is available on their website.

The Swon Brothers Discuss Their New Music