Question: what features of apple watch nike+ series 4 are great for runners?
Answer: You get all the same features found in the Apple Watch Series 4, such as built-in GPS, a waterproof design (up to 50m) and 40mm and 44mm watch case options. And, being an Apple Watch Series 4, there's the option of cellular connectivity in addition to GPS, although it is cheaper to get the version without.