Jacket or overall? A jacket covers the back and sides; an overall also covers the legs and belly. If your dog comes home with muddy legs, you need an overall. If only the back gets wet and speed of dressing matters, a jacket is enough.
The Thermal / Mud Coat and Thermal Coat Pallo come in cuts few makers offer: MK for a dachshund’s short legs and long body, W for whippets and other sighthounds (W01 60 cm, W02 70 cm), and XL for broad-bodied dogs. Sizes 20–85 cm, machine wash 40 °C.