The pillows in this Slumberdown Complete Protection Antiviral Medium Support Back Sleeper Pillow 4 pack are specifically made with an innovative fast-acting antibacterial and antiviral treatment. Developed and independently tested by the experts at the Rudlof Group, these clever pillows help to reduce the build-up and cross-contamination of bacteria and enveloped-virus on the cover, so that you can enjoy long-lasting freshness and a healthy sleep space. RUCO®-BAC AGP is proven to reduce tested viruses in the coronaviradae family by 99%, even after numerous washes, as per the international standard ISO18184:2019. Registered microstructures within the fabric of the pillow transport silver ions that stop growth and cross-contamination of bacteria and virus on any textile. These pillows contain a lovely and snuggly hollowfibre filling that’s hypoallergenic, and the comfortable soft touch microfibre cover feels wonderful to sink into. Having a medium support level, the pillows in this Complete Protection 4 pack are a great choice for back sleepers, or for those who prefer a versatile, mid-depth pillow.