2000s Thermal Henley “Kill Shirt” As Seen Dexter Morgan On Dexter Own a piece of TV history with this iconic thermal Henley, made famous by Dexter Morgan on Dexter! This is the exact style, brand, and color featured on the beloved character, now discontinued and no longer in production. Size: M Material: Cotton/Polyester blend. Condition: Excellent for its age! There are no stains, and while the fabric shows subtle signs of wear (expected after 16 years), it’s still in great shape and has plenty of life left.