Shoe improvement depends on determining what worked well enough to deserve a second chance. The Hyperion II seems to have added those upgrade options which were left off of the original, like overlay materials, direct injected supports, and improved Hydroflow and Substance 257. The ride and tailoring of the upper are sheer comfort, for the high arched foot, because the last is still very curved. Check out the cushioning for yourself.
Updates the Hyperion
Price: $95 Sizes: Men 8-12,13,14,15; Women 6-11,12 Weight: Men 12.2 oz. (size 9); Women 10.1 oz. (size 7) Upper: Mesh/synthetic overlays/direct injected supports, 3M reflective highlights. Midsole: CM-EVA, Substance 257, HydroFlow ST XL, Forefoot Hydroflow. Shank: DRB Accel Outersole: HPR Plus heel, Cushpod forefoot. Shape: Curved Construction: Strobel slip last. Strength: Cushioning Weakness: No significant weaknesses for recommended users. Recommended for: High to medium arched feet with neutral biomechanics.