Size 3XL: chest 70 cm, neck 44 cm, back 55 cm runs snug—measure the widest part of the ribcage and choose the larger size if in doubt. Premium 95 % cotton, 5 % spandex jersey breathes like a second skin, stretches with every sprint, wicks away moisture and never traps heat, so dogs stay cool on summer trails and warm when winter winds bite. Long sleeves guard against thorns, insects, sunburn and post-op scratching, while the soft elastic hem slips over the head in one swift motion yet stays put during zoomies. Wear it twelve months a year: lightweight enough for August afternoons, cozy as a base layer under a coat in January, reduces seasonal shedding on sofas, doubles as calming sleepwear and keeps wounds safely out of reach of curious tongues. From couch cuddles to beach zoomies, this tee moves without bunching, protects without overheating and washes like a dream—just pop it in the machine and it emerges ready for the next adventure.