What are 'snuggle fit' pyjamas?

[ArtichokeAardvark]

Looking at getting new winter pyjamas for DS, aged 4. He hates anything skinny fit so I need nice loose pyjama bottoms, although cuffed at the bottom is fine. Looking on Next, they have loads of fun ones in 'snuggle fit' - but what on earth is that?

In my experience, tight/fitted type. Opposite of what you want. Unfortunately “snuggle fit” is in fashion atm so looser ones hard to find.

Primark do fleecy ones which aren’t particularly tight although I always need to size up for length