Triangle sweater

Retro sweater with black/grey/white triangle pattern on body and black sleeves and back. Tag says 80% acrylic/20% nylon and to handwash. Sleeves are pretty roomy/baggy. Tends to get long hairs stuck in it. A little itchy for me, so you may want to wear a shirt underneath. Good vintage condition. Marked size L. Laying flat, pit to pit measures about 18". Bottom measures 14" but lots of stretch.