Nerd out on this custom Bill Mould T-shirt with white lettering on dark heather high quality Gildan shirt, 50% cotton, 50% polyester.
The equation is the calculation for the total kinetic energy of a moving bicycle.
Only $19.95 with free shipping in the United States. Add $15 for international shipping.
Sizes small, medium, large, and extra large.
Expect minimal or no shrinkage.