I can not suggest a particular brand. Not all brands are comparable with each other however, so stick with one. We used a triple wall, which seems to be an insulated double wall with an outside air space and third jacket or wall. It can withstand chimney fire temperatures once or twice without being compromised. More than that, it should be replaced. Kind of like fall protection equipment, such as harnesses and lanyards, or hard hats which in their case needs removed from service every few years or 'if stressed'.