It's just chicken wire draped over the soil of the raised bed. Within the propped-up concrete paving stones is only soil plus white plastic tags with names of seeds planted. (Mini-blind slats, written on with 0.9 mm mechanical pencils).
Without chicken wire or lots of dry briar branches, squirrels and birds will dig and eat seeds and seedlings, and cats will dig and poop.
Once plants sprout and get tall enoguh to touch it, I arch the chicken wire up higher so they don't get tangled. Hopefully they get big enough that cats stay away before I have to remove the wire.
