The combination of close-to-feather shuttlecock flight performance and four to five times more durability than an ordinary nylon shuttlecock makes the Yonex Mavis series the most cost-effective choice for practice sessions When smashed, a Mavis shuttlecock recovers in only 0. 02 seconds, this performance is just 0. 005 seconds slower than a Yonex feather shuttlecock and 0. 008 seconds faster than the recovery of an ordinary shuttlecock Players should always use the shuttlecocks best suited to the playing environment, in the cold, as the skirt becomes hard, it is prone to breaking, in the hot, the skirt becomes softer and less likely to break Yonex manages product quality by categorising Mavis into 3 temperatures, please ensure that you choose the shuttlecock best suited to the playing environment Shuttlecocks should be stored away from high temperatures and the tube kept upright with the cork side of the shuttlecock facing down