Vaporfly 4

40 miles on gravel and dirt with little foam wear.

“I’ve put 40 miles largely run on gravel and dirt 1k loops into my Vaporfly 4s at 3:30-4:15/km and have less wear on the foam”

More stable than the Vaporfly 3 but not as fast for short races.

“The 4s are definitely more stable, but for 5k or under I am willing to tolerate the VF3's”