Honestly, I wasn't sure what a fleece tunnel was. I had to search for it. My biggest concern is that is does not seem to have any ventilation. Are you supposed to remove these during the day? I am more familiar with the garden row covers that have poly covers with slits or perforations for ventilation. With these you can plant your crops 2 - 3 weeks earlier with the covers on. And on bright, sunny winter days you do not need to worry about them overheating.