A lightweight tee with a polyester interlock fabric for all day comfort, and the eye-catching Columbia PFG logo. He's sure to enjoy the fun colors and comfort of these short-sleeve tees, perfect amongst his peers. The long-lasting high quality material and expert stitching adds to the peace of mind you'll have. This boy's T-shirt features our on-brand Columbia PFG logo in a wide array of color options. Made from quick drying interlock polyester fabric that feels nice on the skin. Columbia offers this youth PFG T-shirt in multiple colors and sizes. Regular Fit. To ensure the size you choose is right, utilize our sizing chart and the following measurement instructions: For the chest, measure at the fullest part of the chest, under the armpits and over the shoulder blades, keeping the tape measure firm and level.