Size 3XL: chest 27.6 in, neck 17.3 in, back 21.7 in snug cut—measure twice, order up if between sizes, use chest as the deciding dimension. Premium 95 % cotton, 5 % spandex jersey breathes like a second skin, pulls sweat away and stretches with every sprint, roll or stretch so active dogs never feel restricted. Long sleeves guard against thorns, claws, bugs and post-op stitches while the soft elastic hem keeps the shirt in place yet slips on and off in seconds. Lightweight enough for summer shade, the same tee layers under coats on winter walks, traps seasonal shedding, doubles as calm-night pajamas and stops licking so wounds heal faster. From couch to campsite it moves quietly, blocks Uv rays and looks sharp on city sidewalks, forest trails, beach runs, training fields or airport terminals—one shirt, every season, every adventure.