Kodiak Canvas Swag 1-Person Canvas Camping Tent (https://kodiakcanvas.com/products/swag-1-person-canvas-camping-tent)
More than a bivy, even lighter than a classic canvas bedroll. Almost a tent, or tent like. Easy fast up and down, built in mattress pad, bathtub bottom.
company video - Kodiak Canvas Swag Tent (youtube.com) (https://www.youtube.com/watch?v=ArcEa8VRKiY)
no guessing on agendas of "reviewers"
Canvas vs nylon, so more weight, but longer lasting.
Not for everyone, but does the job. One of these would have been sweet - back when I was working for a Geoexploration company. Sleeping in the field would have been a lot more restful.