NATHAN Pinnacle Insulated Soft Flask (18OZ)

It boasts an expandable pocket for keys and essentials, ideal for marathons, trail runs, hikes, climbs, and more. With an insulated flask, keep fluids cooler, longer. GRIP FREE: Lightweight, ergonomic mesh strap contours to your hand for a comfortable, no-grip fit. EXPANDABLE HYDRATION: The 3-D soft flask bottom optimizes storage and minimizes size, collapsing as you hydrate for easy handling and storage. QUICK STORAGE: The small, wrap-around pocket with an elastic opening easily stores essentials like keys or nutrition.