Small and toy breeds lose heat faster than big dogs for a plain reason of geometry: more surface area relative to body mass, and much less of them to keep warm in the first place. A chihuahua shivering in a cold hallway is not being precious. A layer that covers all four legs holds warmth that a coat over the back alone cannot, because a draught goes straight underneath a coat.

This is a full-body cut in waffle-knit stretch fabric. The waffle texture traps a thin layer of still air against the coat, which is where the warmth actually comes from, and the knit stretches so the dog is not working against the garment at shoulder and hip. It pulls on and off in one piece, and it is thin enough to layer beneath a waterproof coat on a genuinely cold day rather than replacing one.

• Four-leg full-body cut, covering chest, back and legs
• Waffle-knit stretch fabric that traps warm air
• Pulls on and off as a single piece
• Layers neatly under a coat in deep cold
• Four sizes: M, L, XL and 2XL
• Two colours: milk apricot or navy blue

On sizing and toileting. Measure your dog's back length, collar to tail base, rather than going by weight — length is what decides the fit. And a four-leg suit has to be clear for toileting, so check the cut suits your dog before relying on it for a long walk.

Who it's for: Small and toy breeds who feel the cold indoors as well as out, from autumn through to deep winter.