Hareline 3MM Fly Foam is great for stacked hopper and stonefly patterns. Use the River Road Creations Cutters to achieve consistent bodies.
Hareline 3MM Fly Foam is high floating and is perfect for big terrestrials like Chernobyl Ants, mouse patterns, steelhead skaters, and saltwater patterns like the Gurgler. The thicker foam also resists the thread cutting through it.
Check out the 2MM Thin Fly Foam for images of the available colors.