Big dogs are usually last to be catered for in dog clothing, and the sizes that do exist tend to be technical rather than smart. This is an aviator-cut jacket at the larger end of the range only, in 4XL, 5XL and 6XL, with a faux leather outer, a lapel collar and a shearling-style lining that traps warmth against the body rather than simply blocking the wind at the surface.

The lining is the part doing the work. A deep pile holds a layer of still air next to the coat, and still air is what actually keeps a dog warm, whereas a smooth-lined jacket looks the part and does very little on a cold morning. A full-length zip runs down the front, so the jacket goes over the head and closes in one movement, which is worth having on a dog who treats dressing as an unnecessary delay.

• Faux leather outer with a lapel collar
• Shearling-style lining throughout
• Full-length zip closure
• Sizes 4XL, 5XL and 6XL only
• Weighs 280g to 300g
• Ships in a 34 x 32 x 8cm package

Two things worth knowing. And size on back length from collar to tail base, never on weight, because 4XL means nothing consistent between manufacturers.

Who it's for: Owners of large, short-coated dogs who feel the cold and want a coat with real warmth built into the lining.