The PolarPro Shutter Collection ND Filter Set for HERO8 Black features an ND8, ND16, and ND32 filter and includes a custom carry case. Also included is a snap-on magnetic base that attaches to the GoPro and allows the filters to be swapped efficiently in and out magnetically. Very strong magnets are used to ensure a secure attachment in high-vibration motorsports activities and 60+ mph high-velocity wind applications. ND filters block the amount of light that hits the camera sensor to let you set the correct shutter speed and capture accurate images in bright outdoor conditions. The Shutter Collection uses PolarPro's Cinema Series glass, which has 16 layers of coating to reduce flare and protect against fingerprints and oils.