In single figure temperatures(°C) , for me, waterproof short gaiters are fine with unlined trail shoes. I've worn them with inov8s for nearly a decade. I've also worn Dirty Girls the last 3 years. In cooler times I prefer WPB.
Models I've used. 1: Trekmates Grasmere -really designed for boots- so a bit baggy, and heavy. But primarily 2: Integral Designs (later Rab) Event shorty gaiters. Very light.not very waterproof, but not hot or bulky.
Very pleased to get another pair from Andre's generous offer.