The Fly-Z Irons feature COBRA’s revolutionary Speed Channel technology – a visible trench positioned on both the cavity behind the face and on the sole of the irons designed to flex and recover at impact to deliver great distance through faster ball speeds. The irons modern head shape combined with the Speed Channel delivers higher speeds across the face and yields the best combination of distance, forgiveness and feel. The remarkable feel comes from the harmonic cavity insert that includes an engineered Thermoplastic Urethane insert positioned directly behind the impact zone for vibration damping and improved feel at impact. Combine this with extremely deep cavity undercutting and heel and toe weighting (Zone Weighting Technology), and the Fly-Z irons are true game-changers.