Hydration vest with tons of storage for those long trail runs.. They sell a 4L size and 12L size. Each size is it's own color. I just got the 4L and I love it. Fabric is amazing and fits snug.. been using it every day haha.. definitely expensive.. but so worth it tho. I really enjoy the look of it too.

Nathan NS4535 Vaporkrar Hydaration Pack Running Vest with 1.8L Bladder, Steel Grey, Medium https://www.amazon.com/dp/B01MTFHZV0/ref=cm_sw_r_cp_apa_l5U.Bb0B0D39B

Nathan NS4537 Vaporhowe Hydaration Pack Running Vest with 1.5L Bladder, Fusion Coral, Medium https://www.amazon.com/dp/B01MTFIIJL/ref=cm_sw_r_cp_apa_.5U.BbCJ0ZGB2