The fleece lining is doing the work here and the denim outer is doing the looking. Sherpa on the inside traps warm air against the coat, and it lines the collar as well, which is the part that counts. A dog loses heat fastest across the chest and the base of the neck, and most budget coats leave the neck wide open and then wonder why the dog still shivers.

A denim-look outer is heavier and more wind-resistant than the thin quilted coats at this price, and it holds its shape rather than flapping about on a windy field. It pulls on with fastenings that close quickly, so you are not wrestling a reluctant dog through four leg holes on a cold morning. Sizes run from S to 4XL in light or dark blue, and each weighs between 105g and 267g depending on size, which gives an honest sense of how much coat you get at the small end.

• Denim-look outer with sherpa fleece lining and collar
• Pull-on fit with quick fastenings
• Sizes S to 4XL
• Two finishes: light blue or dark blue
• 105g to 267g depending on size
• Cut for small breeds such as corgis and dachshunds

On sizing, and on rain. Measure back length from the base of the neck to the base of the tail and check that against the size guide before ordering, because back length decides whether a coat fits and your dog's weight does not. Long-backed breeds often need a size up from their girth. Denim is not waterproof either: this is a cold-and-dry coat, and once wet through it holds the water rather than shedding it.

Who it's for: Small, short-coated dogs who feel the cold on dry winter walks, and long-backed breeds who need the extra length.