This costume is made from the same thin shiny polyester material my son's Spiderman costume is made from. Also the same is that the hems at the wrists and ankles are not stitched in a nice way, it looks a bit unfinished (will post a photo when I can). The colours are vibrant and the costume goes on and off easily. My son did wonder why the red 'button' on his left shoulder didn't make the inflatable wings (sold separately) fold down!
I bought this 4-6 size because I read the reviews that it runs small but he is 3yo and this was way too big. I am returning it to buy the size smaller. So, I obviously like the product enough to re-purchase now that I have seen and felt the material.