First Impressions: Arc。Arc\'teryx Norvan LD 4 Soulsonic Fluidity Trail Running Shoes Men\'s US8 Blue Navy X000009614 Breathable Durable Abrasion resistant Footwear construction Dual-density midsole material and construction combine cushioning with lasting shock absorption and support for all-day comfort and stability on rugged terrain Lacing system provides a smooth pull and secure midfoot fit while preventing backslip Tongue pocket secures the laces, eliminates lace bounce, and prevents snagging Flexible external frame wraps the midfoot for a secure hold that prevents forward slide and toe bang Two woven PFAS-free upper materials are mapped to combine flex and breathability with targeted abrasion-resistance Flexible laminated TPU reinforcement zones add protection and abrasion resistance Flat-knit tongue wraps the foot to improve fit and lockdown Footwear geometry Mud-releasing custom 4mm lug pattern provides grip on hardpack and bite on soft trails Offset (Stack height): 6mm (25mm : 19mm) Footwear liner construction Form-moulded sockliner is smooth and comfortable Footwear outsole construction Vibram® Megagrip outsole with LITEBASE technology delivers durable, surefooted performance across a range of conditions while shedding every gram possible Sustainability PFAS (Per- and polyfluoroalkyl substances) Compliant Weight (1/2 pair) 270g / 10oz Trail Run Model X000009614 Size: 8