These are great for your gums - very soft, but with finely tapered bristles so that they get into the gap between your teeth and gums, where a lot of trouble starts.
The non-charcoal ones are just as good, but 4 of these for £5.60 is ridiculously cheap - they normally command a premium price both in the shops and on line.
OK they come from India, but they were pretty quick - just an amazingly good deal.