Arc'teryx VERTEX SPEED LOW W sweaterweather The adjustable hood and cuffs while the Flex absorption The adjustable hood and cuffs offer room to grow and extend wear through multiple seasons Helmet compatible hood and holds the knot RIDE Vibram® Megagrip outsole with LITEBASE technology delivers durability and enhanced grip across a range of conditions while shedding every gram possible Zonal lug patterns are specifically designed to provide forefoot grip while smearing with comfort and surefootedness on the trail Mapped dual density midsole construction combines softer heel and midfoot cushioning for running comfort with firmer forefoot support for rocky terrain Outsole and midsole zones integrate for optimal response and performance 23:16 stack 7mm drop PROTECTION Abrasion resistant PFAS free Matryx® woven polyester upper is durable FIT Stretch materials extend from collar to U throat for a precise sock like fit Lacing system provides a smooth pull and secure midfoot fit while preventing backslip Tongue pocket secures the laces