Scarpa sl active walking boots will keep your feet comfortable, supported and secure as you hike, thanks to their clever ergonomic design and high performance materials. The 'activfit' system combines four elements last, sole, ergonomic design and footbed to give you instant out of the box comfort and performance. The bd last means your feet stay continually supported and secure, aided by auto fit foam inserts in the heel area.  the midsole is reinforced with an additional moulded thermo plastic shank tpu and finished with the vibram biometric outsole.vibram biometric sole unit is anatomically designed for increased comfort heel tension system offers stability and adaptability to the severe stress derived from steep routes ankle padding system uses memory foam to mould the uppers to the shape of the foot  autofit collar ensures the maximum adaptability and comfort of the upper, reducing the impact stress v flex system allows a wider and more natural movement of the foot speed lacing system lets you adjust internal volume and the perfect wrapping of the foot flex point system allows your ankles complete freedom of movement, whilst maintaining support