What a wonderful product this is, a real friend and saviour to anyone who finds duvet cover changing a real challenge. Moreso this is top quality light weight pure cotton with the nicest of white (or grey) very lightly relieved cover, and moreso with the new very unobtrusive high quality zip around three sides and generous tuck in flap inside to keep the duvet in place. Just lay out the cover with the closed end at the top of the bed, unzip the 3 zipped sides, and roll the three open sides up towards the one closed side, making sure that the flap retainers of the duvet cover are on the bottom side, rest your duvet on top of this, tuck the duvet edges and corners under the flap all the way round, and zip up the duvet all the way round. Even better than the amazing but slightly more fiddly popper closers original design which is amazing but this is perfect, even better! No more fighting with the duvet and cover and with a beautiful finish! Well done amazing super helpful Chris