Trouble was, the neck was a leetle bit on the tight side.
It felt more like a turtle neck than a t-shirt.
But I soon sorted that out.
Easy peasy. Cut the neckband off.
And as it's t-shirt fabric it doesn't fray.
I was a bit concerned in case it rucked up in the wash. But nope. It washes perfectly!
And it's so much more comfortable now!