Personalized San Luis Obispo California Biking Cyclist Youth T-Shirt. Fun San Luis Obispo California bicycle design for someone who loves cycling on weekends or commuting to work on their bike Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.