The Leena 2 features:

• The 4 in Fusion4 represents the four ways in which the foot individually finds its fit: upwards, to the sides, diagonally and downwards
• Superior fit is achieved through a dynamically flexible HiFlex Upper that stretches in all the right places
• A Dynergy Sole that varies in the way it yields to pressure and motion in the forefoot and heel
• Easily removed insole allows for insertion of custom orthotic device
• Proprietary responsive sole that dynamically reacts to pressure for instant foot support