yonex mavis 2000 green cap nylon shuttlecock, pack of 6 with grip yonex recovery time 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. playing conditions players should always use the shuttlecocks best suited to the playing environment. the hardness of the skirt – the feather part of the nylon shuttlecock – varies depending on temperature. 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, but the feel at impact is affected by the softer skirt. yonex manages product quality by categorizing 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. flight pattern developed using the flight timing of feather shuttlecocks, mavis nylon shuttlecocks are precision designed and manufactured to provide accurate flight performance. wing rib the wing rib design utilizes air flow through the shuttlecock to restore shape quickly on impact. based on flight dynamics, this original design grants stable flight, contrary to conventional models that restore shape via stiff construction.