Penn joined forces with top professional players to develop this ball

Its performance is second only to natural gut

Tested by some of the world's fastest runners

Long Play® Felt makes these tennis balls supremely durable

ASICS Metaspeed Sky Paris Unisex Illuminate Mint/Black COLLECTION-Type-Stencils and Ink Penn joined forces with topStart fast and never look back in the ASICS Metaspeed Sky Paris Unisex! Designed for stride style runners, this neutral running shoe lets you take longer strides while conserving energy. An energetic midsole and propulsive carbon plate help you fight fatigue later in the race. Its curved sole design reduces ankle flexion, helping you run farther with less effort. Every stride on the FLYTEFOAM BLAST TURBO PLUS foam kicks you into overdrive as you aim