Jumper by Heart Dagger, Crew neck, Plain design, A wardrobe staple, Ribbed cuffs and hem, Muscle fit, A tight cut to the sleeves and chest, 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.