Wet or muddy out there? You can still achieve trail running euphoria in a shoe with a waterproof upper, Vibram® grip, and a lightweight feel. Stay dry and comfortable with a GORE-TEX Invisible Fit and lightweight upper. Feel confident on sloppy terrain with a Vibram® Megagrip outsole with TractionLug and an integrated toe bumper, designed for increased traction. With the new Altra EGO™ P35 midsole foam, it’s a shoe made to deliver a light & efficient ride. It’s got a redesigned heel collar and updated fit construction for a more comfortable, secure feel. With the Altra Fit, you get room for your toes and a secure midfoot for natural movement. A low 4mm drop with rocker shape geometry helps promote natural body alignment and an efficient toe-off. Easily attach a Trail Gaiter, made to help keep your feet clean from debris, with an integrated GaiterTrap™ detail. Waterproof. Responsive. And seriously grippy. The Experience Wild 3+ GTX is ideal for a trip in the woods, no matter the weather.
— altrarunning.com