If you do not find the undershirt that you are looking for, simply design it yourself and build your own customized solution.
Large Animal, Custom Undershirt
Made of spandex / nylon fabric - provides stretchability and comfort.
Soft cotton fabric trim - provides increased comfort for animal’s forelimbs.
Hook and loop or Zipper closure system.
Neck Circumference: the circumference midway between the ears and the base of the neck.
Chest Circumference : the widest part of the animal's chest behind the front legs.
Back Length: length along the curve of the spine from the base of the neck to the junction of the tail and body.