I spent ages looking for pillows with both natural filling and covers. I could have spent hundreds on hungarian goose down pillows, but decided to opt for these based on their good reviews. They need airing before using, and even after airing, one of the pillows had a definite duck smell about it which seems to be disappearing now. I doesn't say on the description but the filling is 85% duck feather and 15% down, which for the price is good value in comparison to others. The feathers do make a crackling sound which i believe is the quills breaking. The pillows are very full when plumped up but squash down easily. I bought 2 pillows because i didn't know how flat they would go after use but i find 2 pillows slightly too high to sleep on my side and definitely too high for front sleepers, 1 is enough. The cotton covers do stop feathers from poking out, however i also bought myself some downproof pillow protectors from Dunelm Mill for double protection. Since i bought these, i stayed at a hotel with Tielle feather pillows which were amazing and I'd definitely recommend them for a great night sleep although haven't checked out their prices.