Boreal athlete Edu Marin introduces us to the new Boreal Mutant. The Mutant is based on a slipper design with a single Velcro strap across the top, which keeps your foot firmly in place. It is aggressively downturned, but soft enough to ensure that smearing and slab climbing is still possible. It uses Boreal’s brilliantly sticky Zenith rubber, which is tried, tested and won’t let you down. The Boreal Mutant features a unique ‘friction skin coating’ on the toe section. Particles of Zenith rubber are mixed with an adhesive to create a sticky toe cover section.