Is this jacket actually waterproof?

Yes. It has a waterproof membrane with fully taped seams plus a Rain Defender DWR finish. That handles rain and wet snow; it is not a breathable rain shell for hard exertion.

Carhartt rates it Level 4, its extreme warmth tier. The quilted brushed lining and quilt-lined hood are meant for the coldest conditions, so it is best for winter work rather than mild weather.

Does it meet ANSI Class 3?

Yes. It meets ISEA 107-2015 and ANSI Class 3, Level 2 visibility. The segmented silver trim is rated to keep its performance through 75 home launderings.

What pockets does it have?

A right chest flap pocket, a left chest map pocket with a waterproof zipper, a left sleeve flap pocket and two lower-front pockets, plus two front utility bands and radio shoulder straps.

Can I wear it over a hoodie or work layers?

It is cut as an outer work layer with a full-zip front and storm flap, so it layers over a sweatshirt or base layers. The internal storm cuffs and shaped sleeve hems keep drafts out.