I found a gray knit beanie this afternoon around 3:15pm outside the Boston Public Library's Copley Square entrance on Boylston Street. It's a medium-weight acrylic blend, ribbed knit, with a black faux-fur pom-pom on top and a tiny white embroidered heart near the cuff. The inside tag says 'Urban Trail Co.' and it's a bit dusty from the wind but otherwise in good shape. If this is yours, send me a quick message here in the app and we can figure out a pickup near Copley.
Approximate area where the item was last seen