Cracking bit of kit for the Osmo Nano. The filters feel purpose-built, screw on cleanly, and, crucially, stay put. I have had clip rings pop off mid-ride before, so a secure thread is exactly what I want. Out in the usual Aberdeen drizzle they shrug off water, and the glass wipes clean without smearing.You get a CPL plus ND8, ND16 and ND32. The glass is HD-grade with a 28‑layer nano‑coating that cuts reflections, repels water and dust, and resists scratches. The fit mirrors the stock lens cover, and it works fine with cases. At £39.99 it sits in the quality camp rather than the bargain bin.Image quality is strong. Footage stays sharp at 4K, colours look neutral, and ND32 makes it easy to hold a 180‑degree shutter on brighter days. I did notice a slight warm cast at ND32, nothing dramatic. The CPL tames glare on water and windows, though control is limited without a fully rotatable ring. The case is solid, if a touch bulky for a jersey pocket.Good optics, secure mounting, and a weather‑friendly design make this a solid buy. I would love an option without the CPL to shave the price, and an ND64 would be handy for summer trips, but for UK light this set earns its keep.