What you're actually getting
This is a thin, unisex balaclava with three holes (eyes and mouth). No frills, no branding worth mentioning. At £2.45, you're not getting merino wool or anything remotely technical. What you are getting is a basic face covering that sits under a helmet or over your head when it's grim outside.
Personally, I'd think of this as a liner, not a standalone piece. Wear it under a ski helmet, a motorcycle lid, or even a cycling helmet on those proper miserable January commutes. It's not going to insulate you through a Highland winter, but as a wind-blocker on a bike ride or a base layer under something warmer, it does the job.
Who this is for (and who it isn't)
If you're after something technical or long-lasting, look elsewhere. But honestly, for kids doing outdoor sports, for the occasional cyclist who doesn't want to spend on proper kit, or for cosplay where accuracy matters more than warmth, this is a sensible buy at this price.
The cosplay angle is actually quite useful. A plain black balaclava at this price means you can order a few without worrying about ruining them.
One honest reservation: sizing is likely to be on the snugger side, so if you've got a larger head, check reviews before ordering. Stock moves fast on these at community-driven deal sites, so don't sit on it too long.