These luxurious Perfectbalance pillows are filled with soft clusters of hypoallergenic microfibre. 'Microfibre' is the very latest in down-like fibre fillings and as far as softness is concerned, beats 'hollowfibre' and 'ball-fibre' hands down! Ultimately, Perfectbalance pillows are the closest in feel to soft, down-filled pillows. But their similarity to down-filled pillows does not end there, as these microfibre pillows have also been specially designed with the unique ability to wick away any excess moisture, in the same way as pillows with a naturally 'breathable' filling, keeping you cool and comfortable on summer nights, as well as warm and cosy in winter.