Built for the mountains, the Black/Cloud Norvan LD 4 M from Arc'teryx is built with FIT Lacing system provides a smooth pull and secure midfoot fit while preventing backslip Tongue pocket secures the laces, eliminates lace bounce, prevents snagging, and holds the knot Form-moulded sockliner, which is smooth and comfortable, and won't absorb water Knit tongue reduces bulk and improves breathability RIDE Vibram Megagrip outsole with LITEBASE technology delivers durability and enhanced grip across a range of conditions while shedding every gram possible Mud-releasing custom 4mm lug pattern provides grip on hardpack, bite on soft trails 45C dual-density midsole material and construction combine cushioning with lasting shock absorption and support Flexible external frame wraps the midfoot for a secure hold that prevents forward slide and toe bang 25:19 stack / 6mm drop PROTECTION 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

Size Conversion from UK to US:
Women: Size up 1.5 for US Equivalent (Ex. 6UK = 7.5US)
Men: Size Up 0.5 for US size Equivalent (Ex. 8UK=8.5US).