Thanks for your comments. Ruth - I couldn't think of a word other than Poncho unless it Sack!
Carole - My daughter had something similar, so I took some measurements from it and made a rough sketch, then planned around it and changed it a little. Two warps, seamed across the middle as loom is only 24", I intended to take the clasped weft over 2/3 rather than 1/3 and wish I had as much of it is lost in the sleeve. Proving that one should never take advice from a man!!!