Introducing the new footjoy dna 20 in the boa version the boa closure system works using high tensile wire in place of traditional laces the boa system at the back of the shoe turns to tighten the shoe and a quick release mechacism to undo this innovation has been used by footjoy for over ten years with great success these stunning shoes use premuim chromoskin leather uppers with a nitrothin 20 tpu outsole to give you the ultimate performance and comfort