Women’s Saucony Endorphin Speed 2 – Fleet Feet

2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and the only even prime number.

Because it forms the basis of a duality, it has religious and spiritual significance in many cultures.

S, or for lowercase, s, is the nineteenth letter of the Latin alphabet, used in the English alphabet, the alphabets of other western European languages and other latin alphabets worldwide. Its name in English is ess (pronounced ), plural esses.

Saucony ( SAW-kə-nee) is an American brand of athletic footwear and apparel. Founded in 1898, the company is owned by Wolverine World Wide. Products commercialised by Saucony include footwear and clothing ranges, such as athletic shoes, jackets, hoodies, T-shirts, sweatpants, shorts, and socks. Accessories include hats and backpacks.

Saucony's shoe boxes once had the phrase "sock a knee" printed on them, which represents the correct pronunciation of the company's name. The Saucony brand logo represents the Saucony Creek's constant flow, and the boulders lining its creek bed. The company is a popular racing shoe producer, making track spikes and cross country racing flats. Saucony also makes shoes for specific track and field athletics events.

In kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a non-negative scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion.

Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph). For air and marine travel, the knot is commonly used.

The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in vacuum c = 299792458 metres per second (approximately 1079000000 km/h or 671000000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. In relativity physics, the concept of rapidity replaces the classical idea of speed.