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!
The puff or bobble crochet stitch is as simple as single and double crochet. This stitch that will provide amazing texture to your hooked bits! -- I think I might try this as a border on a granny square blanket to add a bit of texture.