EVA Foam Cosplay 4mm White 35x59 inch Sheets High-Density Shape Retention Foam. High-Density EVA Foam is specifically formulated for Durability and Shape Retention. This means that after you pour all of that painstaking effort into your Cosplay, Costuming, or Crafting design, you can count on EVA Foam to hold up to whatever Con or daily activities you throw at your creation! It's a developed blend of Shape Retention Foam™ to make it EASIER for you to work with and SAVE you time.