They're not merino.
Are you sure, Ed? They look it.
You might be right, hard to tell.
Their website only suggest that the dark grey one is the only wools, whether the rest is normal.
Edit - found a photo of the actual product;
@andyp started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
They're not merino.