This worsted weight yarn from Isager is made with 56% Alpaca and 44% Organic Cotton.  This is a blown yarn with a cotton core and alpaca blown into the tube.  The yarn has a haze similar to holding a smooth yarn with a mohair.  Each 50g ball has approximately 272 yards.  Suggested needle is a 5.5 to 6mm.  Isager says "ISAGER SOFT can replace the yarn in patterns for sweaters knitted with a silk mohair held together with another yarn.  Some knitters prefer to knit with one strand only but would still like the fluffy structure and this look is obtained with Isager Soft."

The yarns with brown labels are undyed/natural colors.  The yarns with black labels are dyed.  

Photos from Isager.