The Mammut Men's Ruler is a lighter & softer Approach multifunction boot featuring very innovative technology: Single Shell construction made from velours leather for a lighter weight & fewer contact surfaces; 3D textile lining for extra cushioning, abrasion & enhanced temperature; clever asymmetric lacing garage solution; EVA Superlight wedge with Kevlar protective covering; Stone Shield insert to prevent penetration of sharp stones; cushioning Strobel design & the gripex Iguana sole a new enhanced version of the tried & tested Reptilia sole. Also featuring proven & patented technologies such as Base Fit, Rolling Concept, Foot Mapping, memo foam, Speed Lace System, asymmetric lacing, PU Shock Absorber & Liquid Rubber protection. Features Base Fit Rolling Concept Single Shell Construction Foot Mapping Memo Foam 3-D Textile Iguana Technology Asymmetric lacing Polyamide (PA) strap lacing Liquid Rubber Protection Speed Lace System Rubber toe cap PU Shock Absorber Stone Shield Optimally suitable for: Nordic Walking, Walking, Travel, Approach Suitable for: Trail Running, Biking, Urban Climbing