It takes a lot to keep us moving on the bike... like a whole lotta things.  Take a peek at the patterned background on this classic GRiT logo tee for a short list of those things :)

Vintage Wash Tees
Cotton and Cotton/Poly Blend
Unisex Fit
Wear it to the trail, wear it on the trail, keep it in your bike bag, just don't leave it (or any of your bike things) at home!