Blueair Signature Blue 4.0 Replacement Filter Large, HEPA Filter Particle + Carbon + OdorFence, Genuine Replacement for Blue 4.0 Series, Removes 99.97% of Airborne Particles, 6-12 months usage USB-C Audio Adaptor Remarkably protective

Remarkably protective

DESIGNED FOR TRAVEL Effortless charging anywhere with adapters for the UK

offers 5x higher impact resistance

Transforms your favorite songs into dancing symphonies of color and light

Tell them where they need to go… and what to do to save the day

Blueair Signature Blue 4.0 Replacement Filter Large, HEPA Filter Particle + Carbon + OdorFence, Genuine Replacement for Blue 4.0 Series, Removes 99.97% of Airborne Particles, 6-12 months usage USB-C Audio Adaptor Remarkably protectiveThe Blue 4. 0 Signature Replacement Filter is our most advanced HEPA filtration system yet. Powered by OdorFence molecular neutralization technology, it outperforms traditional carbon filters in eliminating stubborn odors. Combining HEPASilent technology with OdorFence, this filter features a 7 stage purification process integrated into three high performance layers: a fabric pre filter, a multi layer filter media, and an enhanced carbon filter. What