Proform CO3.0S Oval Straight Cut 70/30 Blend 3 Paint Brush
I like Proform’s brushes, even though they haven’t been around as long as Purdy has, nor are they as well known. However, these are top quality brushes. They probably have the biggest line of oval brushes of anyone around, including the only angled oval brushes. This is one of their straight cut ones, a 3 brush, which is perfect for latex paint. They won’t tell you what their bristles are made of, but I’d guess that they are a Nylon and Polyester mix, like the Purdy.