A nicotine pouch. There is no tobacco in it, which is what keeps it legal to sell in the UK; genuine snus contains tobacco and cannot be sold here. The confusion comes from the identical under-lip technique.
At 13.2mg per pouch, Killa sits above almost the entire ZYN range and level with the stronger VELO tiers. If your current pouch is a 6mg ZYN, expect a very noticeable jump; from a 14mg or 17mg VELO, Killa will feel familiar with a slightly drier, longer delivery.
Dry pouches carry less moisture, which slows the nicotine release, extends the session and cuts down on drip; many experienced users prefer them. Mini pouches are simply smaller: the same strength concept in a format that disappears under the lip completely.
Tuck one between your upper lip and gum for 20 to 40 minutes, then bin it (the tin lid stores used pouches until you can). Expect a stronger initial tingle than mainstream brands; it settles after a few minutes. One pouch at a time is plenty at this strength.
Killa is produced in Europe by NGP Empire, the manufacturer that also makes Pablo. Buying from a UK retailer like us means stock that has been stored properly; pouches kept too warm for months lose both flavour and punch.