I probably share a prop or costume crafted from EVA foam at least three times a week. The material is popular for cosplay because of its flexibility and affordability. I’ve seen it used to make stylized hair, armor, and props. If you’ve used EVA foam, you know one of the challenges is filling the seams once you’ve pieced it together. Making it look all of one piece isn’t easy. YouTuber and maker Andrew DFT has a useful how-to going over the ins and outs of filling and sealing your seams.