The Buff Cool Net UV+ Filter Tube is designed to provide a filtering effect in the mouth and nose area, similar to that of a classic hygiene mask. It features active cooling technology and virus protection thanks to Swiss technology. The fabric is made from 95% recycled high-performance polyester microfiber with Hei Q Smart Temp active cooling technology from the Swiss company Hei Q Materials AG, which keeps the wearer dry while providing active cooling. The fabric also offers sun protection with a UPF 50+ rating. The Buff Cool Net UV+ Filter Tube is available in two sizes: XS/S and M/L. The Hei Q Viro Block technology is an intelligent Swiss textile technology that is added to the fabric in the final phase of the textile manufacturing process, providing additional virus protection. The filters are not reusable and can last up to one day. The certified filters used meet the performance requirements for efficiency and breathability of bacterial filtration according to the standard for surgical masks (EN14683: 2019 Type I and II). These filters are developed by Ahlstrom-Munksjö and manufactured in Germany.