Arcus BUGrip GTX can withstand tough weather thanks to the waterproof GORE-TEX Invisible membrane. The membrane is integrated with the upper material, making it even softer and more comfortable than a traditional membrane bootie construction. This shoe is for the user that wants to have extra cushioning, whether it might be for longer runs, recovery runs or when running with a backpack. To enhance the comfort and great running feeling it has a rocker midsole to reduce pressure on the forefoot and heel and aid the momentum forward - giving a smooth stride. The midsole is made of compression molded EVA which enables a natural dual density where the forefoot has a higher density - giving a more responsive toe-off. This gives great comfort on longer runs and yet provides responsiveness and a great running feeling. The BUGrip outsole has thirteen dynamic studs that provide reliable traction on all winter surfaces.