Boostic Booster Chimera Drago LV Mago Drago Profile Highly Downturned Highly Downturned Highly Downturned Highly Downturned Highly Downturned Highly Downturned Asymmetry Highly Asymmetric Highly Asymmetric Highly Asymmetric Highly Asymmetric Highly Asymmetric Highly Asymmetric Outsole Vibram XS Edge (3.5mm) Vibram XS Grip 2 (3.5mm) Vibram XS Grip 2 (3.5mm) Vibram XS Grip 2 (3.5mm) Vibram XS Grip 2 (3.5mm) Vibram XS Grip 2 (3.5mm) Midsole Flexan 1.0mm Flexan 1.0mm Flexan Dynamic 1.4mm + PCB Tension Flexan 1.0mm TPS Insert Flexan 1.0mm Upper Microsuede / Ceramic / Alcantara Microsuede + Ceramic + Alcantara Hyperskin, Leather Footbed, Alacantara Toe Pocket Microsuede + Leather Microfiber, Soft Touch, Alcantara Microsuede, Leather Weight 8.3oz (1/2 pair size 40) 8.6oz (1/2 pair size 40) 7.4oz (1/2 pair size 40) 7.1oz (1/2 pair size 40) 7.4oz (1/2 pair size 40) 7.1oz (1/2 pair size 40) Best Use Bouldering, Sport Climbing Bouldering, Sport Climbing Bouldering, Sport Climbing Bouldering, Sport Climbing Bouldering, Sport Climbing Bouldering, Sport Climbing