Ultimate Direction Jurek FKT Vest Features the new FlexForm Bottles. Reservoir hose routing for either over or under your shoulder, left or right side. Large front storage for water, phone, maps, glasses, or food, and the main compartment has bungee system for compressibility Unisex Sizing - Measure wearing the clothes you intend to wear - Please confirm your bottom ribs measurement before ordering. Sizing at bottom ribs (Unisex): SM: 24 - 33 in. / 61 - 86 cm; MD: 30 - 40 in. / 76 - 102 cm; LG: 38 - 48 in. / 97 - 122 cm; Total Volume:708 in3/ 11.6L - Unsecured Volume: 165 in3 / 2.7L - Weight: 11.2 oz. (15.82 oz. with bottles) / 320 g (452 g with bottles) - Height: 13.0 in. / 33 cm - Width: 8.7 in. / 22 cm - Depth: 7.1 in. / 18 cm. Materials: MonoRip Mesh: Breathable, non-stretch, and hydrophobic - this lightweight monofilament mesh is ideal for bounce-free load carrying. 60D Silnylon: Greater strength and abrasion resistance with low weight. 4-way PowerStretch Woven: A spandex-enhanced stretch woven for secure carry and great looks