Personalized Ohm Tree Women's V-Neck T-Shirt. A tree filled with the ohm symbol and edged in a bit of resistance is a fun winter holiday and Christmas gift design for electricians and electrical engineers. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit