Nikki Reed has designed some fun t-shirts for an important cause! As People exclusively shared, the Twilight star— who's known to be one of the most prominent environmentalists in Hollywood— recently teamed up with clothing brand UpWest for their Earth Day collection. Designing two limited-edition shirts for the company that use a material blend made from recycled bottles, Reed got creative when it came to her collaboration.

Both shirts in her UpWest capsule collection, which are now available online, feature a simple image on the front and a witty slogan on the back. The $32 women's t-shirt says "Your Mama Is A Badass", while the $34 men's version reads "Don't Trash My Mother". All net proceeds from the shirts through June will be donated to the Ian Somerhalder Foundation, an environmental outreach and education organization named for Reed's husband.

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Nikki Reed attends 1 Hotel West Hollywood Grand Opening Event on November 5, 2019.

Reed calls collaboration with UpWest "really exciting" for her

Reed opened up to People about her partnership with UpWest for their Earth Day collection, revealing that it allowed her to stay true to her "quality over quantity" ethos. She also commented on the fact that she loves the brand's "chic, comfy, and outdoorsy" style as well as what they stand for. 

“UpWest was immediately able to kind of step up to the plate and say, ‘We love that you are focused on using recycled materials. We want to do that too,'" Reed shared. "That was really exciting for me". The senior vice president of UpWest, Jamie Schisler, also voiced excitement about joining forces with Reed.

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"Our team thoroughly enjoyed collaborating with Nikki," Schisler told People. "Her personal commitment and passion for sustainability align with the UpWest mission of positively impacting people and planet. We are proud and excited to introduce this collaboration to our customers".

Nikki Reed, wearing Max Mara, attends the 13th annual Women In Film Female Oscar Nominees Party on February 7, 2020.

Reed says there's been a "huge shift" in sustainable living

Reed also admitted that sustainable fashion can be difficult to support, because there are a variety of factors that make it costly. "Any time that you’re searching for anything that’s organic, recycled, upcycled or produced locally, there’s a premium to be paid for that," the actress, who has her own sustainable lifestyle brand Bayou With Love, told People

She then went on to talk about what will help make sustainable brands more easily accessible to people. "It’s the job of the consumer and businesses to sort of prioritize that," Reed shared. "I think as that becomes the norm, that premium will change". Reed also mentioned how she has seen a "huge shift" when it comes to the way the world views sustainable living.

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"We’re so concerned with what we put in our bodies now, which is great. You know, now people really prioritize farmer’s markets and buying organic local food, which is awesome," she said. "Now, we’re getting to this place in the world of fashion where we’re asking the same questions and putting the connections together that what we put on our bodies is also a big thing".

See the video Nikki Reed shared on Instagram about her collaboration with UpWest here, and check out the t-shirts she designed!