The pillows in this Slumberdown Firm Support Side Sleeper Anti Allergy Pillow 2 pack are specifically made with an anti allergy filling to help reduce the build-up of dust mites, bacteria and fungus. Tested and approved by leading experts at Allergy UK, they're an ideal choice for allergy sufferers and all year-round use. Our lovely and snuggly hollowfibre filling is soft and comfortable, and the luxury microfibre cover feels wonderful to sink into. For those who prefer to sleep on their side, our firmer support pillow allows the right level of comfort and support for your head and neck, whilst keeping your spine straight, so you can enjoy a comfortable night's sleep.