Clostnature is an outdoor gear brand established by 3 Mountaineers in 2006. The start-up team members were college student and was in the same mountaineering association.

Clostnature dedicated to making functional, tough outdoor gear with a focus on sustainability. Not the retroactive greenwashing type of sustainability that you see in marketing campaigns, but meaningful steps toward creating products that are better for the environment. One of Clostnature's recent sustainable initiatives is its use of recycled papers in products' packaging.