This sweater is worked on a circular needle with a number 3 weight yarn from the bottom up. Any number 3 yarn can be used, check your gauge on the cable pattern provided. Sleeves are worked separately on double points or on a cable with the magic loop method. If worked with the Cascade yarn mentioned the sweater is very soft and has a lot of stretch. You may be able to use a size smaller. I worked up the size Large for myself and I think the 36 may have been a better fit. There are many cable stitches in this sweater. Sweater yoke if worked flat and joined again in the round to finish with the collar. Underarm seams are worked in the kitchener stitch.