I started wearing these lightweight, relatively inexpensive zip-neck pullovers after I took an EMT-B course. It’s less bulky than a sweatshirt, just as comfortable as PJs and very functional. There are two side, on-seam pockets large enough for your hands, a neat large velcro-sealing chest pocket, and a D-ring on the side for attaching a key chain or lanyard. They’re very durable as the elbows are reinforced with denim. And they’re widely available in three colors (navy, black & gray). Too warm for the summer here in the Northeast, but perfect for the rest of the year as an everyday pullover.