I love my non-weight-adjustable Everlast 20lb vest for ME workouts and hill sprints. It is nice and tight fitting with elastic where needed. I’ve got other weight-adjustable vests that go to 60lb, but they fit like crap and bounce when you jump. The Everlast, you can actually run with.
I was gifted an adjustable weight vest up to 20kg in 1kg increments. The adjustability is nice as it allows for progressive overload from one workout to the next, however it’s very cumbersome and I never wear it if trying to do any dynamic movements or running.