Media Note | For “International Mountain Day” on December 11th, 2022, Mammut, in collaboration with the Unless Collective, is launching a limited edition of biodegradable t-shirts and hoodies. The sustainably produced products are transmitting the message "Protect your playgrounds" – inviting the outdoor community to join the movement for more conscious adventures.

In line with Mammut’s goals to minimize their impact, Mammut has teamed up with UNLESS to create 100% plant-based t-shirts and hoodies. The result: fully biodegradable products.

The decomposing process

Product Fact Check

UNLESS makes 100% plant-based streetwear designed to leave zero plastic waste. Even the thread, label, and print are made from natural materials, which means each product is completely biodegradable. The cotton is grown in the USA and trackable.

Donations for our Winters

Mammut has committed to donating all profits to Protect Our Winters (POW). Since 2020, Mammut has been partnering with the non-profit organization. POW campaigns for climate protection and works on solutions to bring about change in society, the economy, and politics. ​

Discover more about this special collaboration here:

Biodegradable Products for International Mountain Day.pdf

PDF - 234 Kb

PR Team Mammut

Mammut Sports Group AG



About Mammut Sports Group AG

Founded in 1862, Mammut is a Swiss outdoor company that provides high-quality products and unique brand experiences for fans of mountain sports around the world. This leading international premium brand has stood for safety and pioneering innovation for 160 years. Mammut products combine functionality and performance with contemporary design. With its combination of hardware, shoes and clothing, Mammut is one of the most complete suppliers in the outdoor market. Mammut Sports Group AG operates in around 40 countries and employs around 800 people.