I bubble wrap as I keep all my tenders in the greenhouse and the less I have to heat, the cheaper it is. Ava (my better half) brings home waste bubble wrap from his work, so I am recycling it ;D and I am careful not to wrip it toooo much. Inevitably some gets past it and ends up in teh bin, but as I have recycled it once, I don't feel quite so bad. I guess the fleece will keep things warm, but I don't think it would be thick enough to keep any real tender plants safe.