How do these jeans fit compared with slim jeans?

They are a relaxed straight fit: roomier in the seat and thigh, with a leg that stays straight to the hem rather than tapering. If you usually wear slim jeans, expect a looser silhouette.

Slightly. The fabric is 99% cotton and 1% spandex, so there is some give for movement, but they are not a high-stretch denim.

What is the leg opening like?

It is a straight leg, so the opening stays roughly the same width from the knee down. That fits over most sneakers and boots.

How should I care for the dark wash?

Wash inside out in cold water and hang or line dry to slow fading. Skip hot water and high heat, which speed up color loss.

Are these good for all-day wear?

Yes. The relaxed cut and small amount of stretch make them comfortable for sitting, driving and walking, and the cotton-heavy fabric keeps a denim feel.