J:Son Sweden's colored foam selection has many usages in fly tying. And it will float very well. You can cut desired pieces with scissors. Try for example terrestial bodies or dry flies.

Four different color selections (all options include six different colors): Mayfly, caddis, generic and stonefly.

Package includes both 1 mm and 2 mm thick sheets six pieces, altogether twelve pieces. Sheet size is about 5 x 15 cm.