We love SUPER bulky yarns - they knit up fast, turn heads, and are just amazing for home furnishings, giant cowls, wraps. There's no end to the projects you can work up with these - and they are GREAT for Arm Knitting, too! We have two types, the Bagsmith, which have a nylon/cotton core, and PUDGY, which are more roving type bumps, with no core.