My older Cocker is 12 so thought she would appreciate a jacket to help against the Winter weather this year. She is still active and out everyday enjoying woods and fields. This design is perfect … gives room where needed around shoulders and comfy elastic leg straps … the neck toggle to close the collar in rain and toggle to shorten the back if needed are great extras. The under chest / mud guard section is stretchy and comfy and the body strap is elastic for give. If you use a harness (I don’t) there is also a waterproof zip on top to give access for lead) This looks great, is lightweight, warm and waterproof and is non restrictive allowing her very comfortable freedom of movement. She never liked wearing clothing but is very happy for me to put this jacket on her! Highly recommend