Vest by Heart Dagger, Be the best dressed guest, Check print, It's never been so hip to be square, Button placket, Contrast back with an adjustable cinch, Skinny fit - cut closely to the body, 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.