Aero-Swing BLACK-RED-PRO Black Pro Bat sku-14957562921

The Aero-Swing Aero-Bat is a Black, Pro-size, Unisex swing-training bat listed under Softball Gear & Equipment. Model BLACK-RED-PRO; sku-14957562921; UPC 468379191499. The maker says players from 13 MLB organizations use it and reports swing-speed increases of up to 20 MPH through training while maintaining a natural swing path.

Instead of added weights, it uses air resistance for on-deck warm-ups. Its patented "pineapples" concentrate resistance at the ball-impact point to engage fast-twitch muscles. The Pro size is intended for longer, faster swings; Standard is intended for players who use a shorter game bat, and Youth for smaller, younger players. Pro and Standard each have 3 pineapples; Youth has 2.

The variations are designed for lag, tempo, and timing.