Personalized Grandpa Hiking Buddy Hiker Youth T-Shirt. Grandpa little hiking buddy Youth T-Shirt - White for a grandson who likes to hike with their grandpa. 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.