Active Power Strap provides dynamic support, increasing responsivness whil minimizing shin-bang * PowerBlock tour is the most powerful ski/walk mechanism available offering fixed cuff power and ridigity * SCARPA Intuition Speed Pro G Liner blends high performance and all-day comfort * V-Frame Power-Ribs offer strength without adding weight * Weight: 1820g; 4lbs (1/2 pair size 27)