This very nice spring poncho is made with the yarn that is 70% of Supima cotton and 30% of shrink-proof merino wool.

It can be used buttons to close the sides. It is made with 2 rectangular pieces, so it is easy to change the size.

download this pattern:
japanese http://atelier-mati.com/?p=5798
english http://english.atelier-mati.com/?p=304