The new Glycerin 16 has the new DNA LOFT cushioning which is designed to provide a luxurious feeling underfoot without loosing responsiveness and durability. It also makes every move from heel to toe feel incredibly soft and smooth. The plush feel of an internal stretch bootie surrounds your foot and moves and expands with your stride. The new engineered mesh upper and #D Fit Print technology only enhances the fit. Overall a great new update your sure to enjoy mile after mile in.