Size 3XL: chest 27.6 in / 70 cm, neck 17.3 in / 44 cm, back 21.7 in / 55 cm snug cut—if your dog is between sizes, order the larger one and always prioritize chest measurement. Premium 95 % cotton, 5 % spandex jersey breathes like a second skin, wicks moisture and stretches with every sprint, roll or nap so your dog stays cool, dry and free to move. Long sleeves guard against scratches, insects and post-surgery licking while the elastic hem lets you slide the shirt on in seconds and keeps it in place during zoomies. Lightweight enough for summer yet cozy as a base layer in winter, the tee also traps loose fur in spring and fall to cut down on house hair and doubles as calming sleepwear. Whether the day calls for couch cuddles, neighborhood walks, park play, hiking, camping, travel, training or beach runs, this all-season essential keeps your pup comfortable, protected and ready for every adventure.