Bulky weight 3 ply wool in a rich, very dark heather grey. The color is on the warm side of grey, not your standard charcoal. Alas, it is discontinued. I have this and a few other colors. It's got a bouncy feel, not ultra-soft like baby merino, but not coarse like some wools.
 
Machine washable, but do use a very gently cycle. Personally I always handwash my handknits, and recommend that because machine washing involves a lot of rubbing against other fabrics, resulting in more fuzzing, and loss of stitch definition.
 

100% wool
Color Combustion Grey; lot 005
100 gr/110yds  |  3.5 sts/inch on US10.5 needles
Machine wash or hand wash, cool, gentle.