Shirt by Heart Dagger, Current mood, Bold print, Revere collar, Button placket, Short sleeves, Relaxed fit, Think baggy and casual, Exclusive to ASOS. Heart Dagger welcomes ASOS to The House of Heart Dagger with an exclusive tailoring collection. A House which has been built on the very foundations that it strives to uphold and take forward: timeless style, rich fabrics, precision-cut suits and a touch of modern-day dandy.