The cute Monkey Hat is crocheted using 8 ply Bendigo Cotton / Heirloom Cotton. Other yarns can be substituted so long as the pattern is worked to the measurements given for the various sizes. Extra yarn will be needed from your stash for the pattern features.
Video Tutorials are available on the various stitches used in the pattern. These stitches can only be viewed on the ravelry site prior to printing the pattern. Just click on the various stitches to view.