$5 of every purchase is donated to Austin's Aquifer Alliance: aquiferalliance.org/
The Barton Springs and the Austin Blind salamanders are found only in the Barton Springs segment of the Edwards Aquifer and its contributing zone.  The third species, the Jollyville Plateau Salamander, lives primarily in the springs and streams of northwest Austin and southern Williamson County. Under the U. S. Endangered Species Act, the Barton Springs Salamander and Austin Blind Salamander are endangered, and the Jollyville Plateau Salamander is threatened, because of the ever-increasing human impact on their habitats.
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It's made from 45% recycled polyester and 55% organic cotton. 
.: 55% Organic Airlume Cotton, 45% Recycled Polyester (fiber content may vary for different colors)
.: Light fabric (4.2 oz/yd² (142 g/m²))
.: Semi-relaxed fit
.: Tear-away label