Variable ND filters are an essential purchase for any serious run-and-gun videographer. If you want to keep your shutter speed under control, maintain a wider aperture in bright light, or avoid constantly changing fixed ND filters between shots, a good VND is one of the quickest upgrades you can make to a camera setup.
Freewell has teamed up here with seasoned YouTuber Brandon Li, known for his fast-moving travel and documentary-style filmmaking, and this kit has clearly been designed around speed, convenience, and minimizing the number of individual filters you need to carry.