Shirt by Heart Dagger, Ideal for layering, Spread collar, Button placket, All-over branding, Regular fit, Just select your usual size, 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.