Without snaps or the ability to snap together.
Snapless things might be harder to put on or take off.
Examples:
The jacket is snapless, so it has buttons instead.
I prefer snapless shoes because they are easier to put on.
She chose the snapless bag because she doesn't like snaps.
The snapless pants are much easier to wear than the ones with snaps.
The snapless bracelet is so much simpler to use.
I like the snapless shirt because it's faster to put on.