Officially Licensed Janis Joplin T-Shirt. Leave the diamonds, wear Pearl. Bluescentric's new line of official Janis Joplin t-shirts and apparel works to embody the powerhouse blues singer. This Bluescentric Brand Janis t-shirt is a premium lightweight (4.2oz) "vintage" style Next Level shirt. Solid colors are 100% combed, ringspun cotton. Athletic Heather is 90% cotton. All other Heather colors are 52% cotton, 48% poly. Sizes run true. Favorite tees are lighter and slightly more fitted compared to the Classic Gildan tees.