The Wilson Sensation 15L is a multifilament string from the worlds most familiar tennis equipment maker. Sensation 15L is frequently recommended by professionals. The string is made with revolutionary Dual-wrap multifilament Xycro Micro Fibres that offer similar feel & colour to the natural gut but at a much lower price. The unique sensitivity & feel comes from Wilsons Dynelastic technology, which is a special wet wrap method that twists & wraps the fibres simultaneously. Dynamic elasticity holds the ball longer because the string is pre-stretched for tension retention.