To be honest, it doesn't feel warm or cool. She has not lost her undercoat yet. She just seems so miserable, panting all the time. She does stay inside in the air conditioning, lying on the cool floor over the vent. I have had her for one year and take her to the groomers every 6 -8 weeks. I'm pretty sure the next time she goes they'll be able to blow out quite a bit of the undercoat, I just can't help wondering if she'd be more comfortable shaved.