As seen in Portal 2, this is the Aperture Science Innovators logo, the corporation founded by Cave Johnson and precursor to Aperture Laboratories, competitor of Black Mesa.

• 100% combed and ring-spun cotton (Heather colors contain polyester)
• Fabric weight: 4.2 oz/yd² (142 g/m²)
• Pre-shrunk fabric
• Side-seamed construction
• Shoulder-to-shoulder taping