altaltalt - Tri-Blend T-Shirt

Can you figure out the secret meaning behind the symbol??  the softest, nicest, highest quality shirt, fits perfectly

 

.: Regular fit
.: 50% Polyester / 25% Combed ring spun cotton / 25% Rayon
.: Light Fabric (4.3 oz/ yd² (146 g/m²))
.: Satin tear-away label
S M L XL 2XL 3XL
Width, in 18 20 22.01 23.98 25.99 28
Length, in 28 28.98 30 30.99 32.01 33