PLEASE NOTE : This is Athletic Vest for running and sport activities only 2-Liter Bladder Pocket Has Internal Routing For A Hose Has Five Total Pockets With Two Snack Pockets, Two Water Bottle Pockets And A Secure-Zip Phone Pocket That Fits A Large Phone Reflective Accents On Back Side Compression Provides A Custom Fit For Your Torso And Minimizes Bouncing When You'Re Running Soft, Breathable Fabric Is Comfortable Even When You'Re Carrying A Heavy Load Trekking-Pole Carry System On Rear Of Pack Two 500-Ml Soft Flasks Included Whistle Included Zippered 6-Liter Pack And Bungee System Can Hold Extra Snacks, A Water Filter Or An Extra Layer Style: NF0A81DZ Backpack: 70D Nylon Ripstop With Non-PFC DWR Finish Vest Harness: 150D Polyester Air Mesh With Non-PFC Durable Water-Repellent (Non-PFC DWR) Finish Vest Pockets: 180 G/M² 85% Nylon, 15% Elastane Mesh Avg Weight: 9 oz (260 g) Dimensions: XS - 13.8'' x 14.6'' x 2.8'' (35 cm x 37 cm x 7 cm) / S - 13.8'' x 15'' x 2.8'' (35 cm x 38 cm x 7 cm) / M - 15'' x 15.7'' x 2.8'' (38 cm x 40 cm x 7 cm) / L - 17.3'' x 16.5'' x 2.8'' (44 cm x 42 cm x 7 cm) / XL - 17.3'' x 16.9'' x 2.8'' (44 cm x 43 cm x 7 cm) Volume: 488 in³ (8 liters)