I can confirm Incase Facet Sleeve for the MacBook Pro 16” 2021 fits.
The zipper 90° edge does bulge a tad (a few mm) but it’s hardly noticeable. I’m sure it will stretch and I’m ok either way.
I like that the opening is good for a zipper case since it unzips 180°, giving access to the interior pockets and more room for ingress/egress. I prefer this design to top/edge most zipper cases.
The case does have internal pockets with minimal padding. It would be good for dongles, flash cards/drives but not a charger or thicker items without bulge.
The tweed is tight, good feel and has some grip.
For comparison, the size/thickness is about the same as Native Union Stow Slim. I purchased the Stow Slim “incase” the Incase Facet didn’t work out.
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