The fact that he can be close to the back with a zip and open, it is the chest warm and it can not get through the snow zipper.
In addition, it is suitable for dogs (if you know what I mean). He has a small "notch" to go belly.
Furthermore, he is good and can you can put him even closer by the band on the belly.
What I also like about the jacket: Front on the legs it does not rub against the skin and the dog has enough freedom to the front legs around.
Conclusion: Would buy it again and again (which I already the 3rd time and have now)