REI is a cooperative that provides outdoor gear, clothing, and classes for various outdoor activities.
Features:
- they have been a leader in the outdoor industry since 1938 and have millions of people who are customers and members of their website. So they are pretty reputable and easy to promote;
- if you have a website about outdoor activities, or other related topics, you can apply for their program;
- if you don't have a website come on your application will not get accepted. So your traffic matters a lot. Plus your website needs to be at least three months old.