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)
Sweating - absent. An abnormal lack of sweat in response to heat may be harmful, because sweating allows heat to be released from the body. The medical term for absent sweating is anhidrosis. Anhidrosis sometimes goes unrecognized until a substantial amount of heat or exertion fails to cause sweating. Overall lack of sweating can be life-threatening because the body will overheat. If the lack of sweating happens in a small area only, it is usually not as dangerous.