Mens Järv (Swedish forwolverine) Bugrip GTX keeps your feet dry and offers impressive grip: each sole features 18 dynamic studs. The dynamic studs can retract slightly into the sole when walking on smooth surfaces such as rock, allowing the rubber to make contact with the ground as well. The cushioning of the Järv shoes is optimized for running, but these sporty shoes are also excellent for walking. For those interested in the technical details: this shoe model uses the so-called Invisible Fit type of Gore-Tex membrane installationthis provides better comfort than the more common bootie construction method. - Slightly wide fit at the front, snug at the heel - Lightweight yet durable upper fabric with a waterproof Gore-Tex ePE membrane made without PFC compounds - Midsole offers a good balance of stability and cushioning - Flexible ankle section helps keep ankles warm and prevents debris and splashes from entering the shoe - Outsole material contains 23% natural rubber - Drop