What items give a +1 to saving throws?

My DM gave a few magic items to the party after a particularly rough encounter with a dragon a month or so ago. One player was missing, so we only had 3, and one player died. The result of this is that my greedy gnome criminal and the guileless half-orc fighter where the only 2 alive. Of course, I took all the magic items.

My DM can’t remember what one of the items was and neither can I. All we know is it gave a +1 bonus to saving throws, and was in the DMG. What magic items give +1 bonus to all saving throws?