Boucle can be made out of a lot of different things, but I would say if you're not used to working with it try something acrylic, like Bernat soft boucle yarn. As an acrylic, it can be machine washed and is very durable.
cold sweat - the physical condition of concurrent perspiration and chill; associated with fear. fear, fearfulness, fright - an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)
This may also be accompanied by nausea, dizziness and pale skin. There are various possible causes of cold sweats including menopause night sweats, hormones, medical conditions (such as diabetes or infections like tuberculosis) and medications (especially antipyretics).