Meg has a Zentek as well; I actually love it for the fit, and it does seem to keep her fairly warm given how lightweight it is. Crazy expensive though; I got talked into it at the vendors at Cynosport, just because I loved the look of them.
Tess wound up with hers because we were at an agility trial where it was colder than I'd expected, and I got worried that she was not staying warm enough in the building. The only vendor selling any kind of coat had the Zentek jackets, so Tess got one. It is a nice fit, she is more comfortable in it than she is in the other jacket I have for her. (her other jacket is a fleece one from
http://www.doodlebugduds.com/default.html , black with a red plaid collar). I guess it's a good thing I got the Zentek coat, if I was ever going to have one, since I believe the red is a discontinued color and Tess wears red.
She wore the Zentek coat on the 2 plane trips we've taken, since it's supposed to keep them cool as well as warm, I figured it could help keep her comfortable while crated in the baggage hold, whatever the temperature might be.
Not the best photo, but here's Pirate in
his Doodlebug Duds fleece jacket:
All my dogs have had one. I had them custom make this one for Pirate, because the medium size, which fits my other dogs well, wasn't quite right for him. Like all my dogs, he doesn't really like wearing a coat right now, so I don't put it on him much. I find they feel the cold more as they get older, so I use the coats more as they pass middle age. I mostly only put the coat on him now if he's going to have to be sitting around in particularly cold temperatures.