crocheted wrap pattern from ravelry : Cocobay Wrap. This connects to a website in an unknown (to me) foreign language with several good photos of this projects. There's a link to Ravelry, where there's a link to the free pdf pattern.
El tejido es con dos agujas, pero las imágenes dan una buena idea para hacer un bolero con un rectángulo. Yeah, that's what I was gonna say. actually this can be done knitting, crochet, material as it is just a rectangle sewn to make sleeves!