
MTL (Merrell Test Lab) is our innovation incubator where all our top products come to life. We test and refine right on the trail, using nature as our guide and elite athletes as our North Star to produce our best performance products.
MTL is our innovation incubator where all our top products come to life, using nature as our guide and elite athletes as our North Star.
Go Far
The result of numerous rounds of
product testing on the feet of champions, the MTL Long Sky is a go-far racer that’s enabled our best trail running elites.
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PRONATION-
CONTROLMedial post stabilizes tired legs and feet
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LIGHTWEIGHT &
TEAR-RESISTANTRugged mesh upper for confidence and speed
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STICKY GRIP
Vibram® Megagrip rubber sole for traction on wet or dry rock


Ragna Debats breaks through odds. In 2018, at the age of 39, she achieved a trail runner’s highest stage: becoming double World Champion in Skyrunning and Ultra Trail. It’s her and athletes like her that make up the Merrell Test Lab, our proving grounds for our most technical innovations like the MTL Long Sky.
