The Pinnacle is a lineup of extremely effective and efficient race packs from Nathan. They're designed around features that make them both more comfortable and more capable when it comes to racing with a pack. A Seamless Fit The Pinnacle offers comfort and freedom of movement with a vest design. Its lightweight and breathable construction helps you stay cool and dry, while the tapered back panels effectively wick moisture up + out. With a slightly extended back, this vest distributes weight and capacity. Smart Storage With two new Kangaroo pockets, the Pinnacle provides side entry access for quick and easy retrieval. Additionally, a vertical pocket offers ample space for larger essentials like trekking poles. The vest also features two water-resistant chest pockets, specifically designed for your phone and a pill pocket complete with a whistle for added safety. With a large diagonal zipper and generously sized pockets, accessing items such as extra layers, keys, and nutrition becomes a breeze. Details: Two water-resistant pockets on chest for phone and pill pocket with whistle Added side pockets New Kangaroo pockets New Shape of vest that sits longer in the back for dispersed capacity Large diagonal zipper for easy entry Tapered back panels for a chimney wicking effect Insulated 1.6L Hourglass bladder Gear Capacity: 12L – 732.2 Cu. In 13 Exterior Pockets BPA Free Materials: 85% Polyester + 4% Spandex + 8% Nylon + 2% Rubber Wire Dimensions 16 x 16 x 4 in Weight: 0.68lbs – 311.84 g UNISEX SIZING: With arms relaxed down at the sides, measure circumference of chest at bottom of sternum.S - 36"-38"M - 39"-41"L - 42"-44"XL - 45"-47"