It's not an invisible shirt, it's a Duck Camo ActiviTEE from the High Fives Foundation and yours truly. If you've never heard of the High Fives Foundation, just take a look at their mission:

[To] Create a universal shift in adventure sports that expands what is possible for those who have faced life-changing injuries. High Fives focuses on preventing life-changing injuries and provides resources and hope if they happen. As a 501(c)3 non-profit organization since 2009, High Fives has helped countless injured athletes and Veterans get back to doing what they love.

- the High Fives Foundation

This AcitivTEE is a part of our Gear that Gives Program in that a portion of each sale goes back to the partnering organization.