T-shirt by Heart Dagger, Throw on and go, Crew neck, Short sleeves, Bold print, Oversized fit, More room for activities. 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.