Men's Flex 9 Challenger Running Short M Sleeveless Tops while the new configuration gives

while the new configuration gives additional midfoot support

BDS Sensors Optical Heart Rate Monitor Barometric Altimeter Accelerometer Gyroscope Compass Water Resistance 10ATM (100 Meters/328 Feet) Working Temperature 14°F to 140°F (-10°C to 60°C) Storage Temperature -4°F to 158°F (-20°C to 70°C) Charging Time Less than 2 Hours Battery Life (46mm/42mm) Up to 100/80 Hours in UltraMax GPS Mode Up to 35/25 Hours in Full GPS Mode Up to 30/24 Days for Regular Use Supported Workouts Run

BUT NOT ON PURPOSE

Fits waist size 24″ through 47″

•Contoured left and right knit construction ensures the ultimate fit

Men's Flex 9 Challenger Running Short M Sleeveless Tops while the new configuration givesThe Nike Flex 9 Printed Running Short Mens are designed with sweat wicking fabric and built in briefs for comfort and support from start to finish. Elastic waist with interior drawstring provides a secure fit. Secure zip pocket at right rear. Mesh panels increase ventilation and cooling. Regular fit is eased, but not sloppy, and perfect for any activity.