Arc’teryx Kragg Blurred Bird Shirt Black Sapphire. Crafted from lightweight SUPIMA® cotton, the Kragg SL Cotton Blurred Bird Shirt delivers a naturally soft feel with the durability and breathability needed for climbing and everyday wear. The regular fit is patterned for unrestricted movement with a roomy, airy feel that keeps you cool and comfortable. Finished with a blurred Bird graphic across the chest, the tee blends technical performance with Arc’teryx’s clean visual language.