How do I pick the right size?

Measure the chest girth just behind the front legs and the back length from neck to tail base, then match those numbers to the chart. Treat the weight ranges as a rough guide only, since body shape varies a lot between breeds.

No. The shell is polyester with a fleece lining, so it handles dry cold but not rain or wet snow. For wet weather you need a coated or waterproof outer layer.

Can I attach a leash while the dog wears it?

There is no harness opening or D-ring, so the leash has to go on a collar or on a harness worn underneath or over the coat.

Will it fit a dog with a broad chest?

The pull-on cut has little stretch, so broad-chested breeds often need to size up on chest girth. Check that the larger back length still suits the dog.