aonijie hydration packs 5.5l trail running vest with 2l bladder reservoir marathoner hydro backpack aonijie bag size ( l x h ): 39 x 41cm / 15.35 x 16.14 inches,<br> only 8.82oz running hydration pack super light.<br> breathable running hydration vest men's women's.<br> 5.5l good volume race vest only 250g, make your running more flexible and smooth.<br> soft and comfortable material, perfect fit your body keeping the pack from bouncing while running.<br> air mesh back and shoulder pad, breathable .<br> 2l water bladder and 2pcs 250ml water bottles equipped <br> water bladder - 2l durable, built for a lifetime of tough use. <br> 2 water bottles - 250ml. <br> running hydration pack bottles fit easily into the main warehouse, and not leak.<br> the best size fits perfectly for running, biking, hiking, and other outdoor adventures.<br> all-in hydration backpack. stay hydrated while you enjoy your outdoor sports.<br>