Those are really cute!
Especially nice for outside when the temps are cool.
I never used mitts on my babies to keep them from scratching themselves, just kept their finger nails cut short.
There are a lot of safety concerns with babies' and kids' clothing. Manufactures no long put ties in hoods because of strangulation hazard.
I never put ties through beading rows of the bonnets or infant sweaters as in older knitting patterns.
Ribbon ties can be a huge concern, if not sewed on very securely.
My 2nd baby sucked about 4" of ribbon down her throat before I saw it. I had doubled sewed it to the bonnet, but the experience was still very scary.
I use adjustable button bands, or I make crocheted ties that are part of the neck band itself.