This is a lightweight backback for both running, hiking and mountainbiking. Can be bought with or without hydration bladder - 1 L.
Name: Cycling Running Bicycling Backpack
Water bag Capacity: 1L
Convenient, adjust can be almost under any shape, in the front pockets can put gels, phone or a couple of small soft water bottles. In the tank climbs almost 1.5 liters. At a temperature of about 0 the water remains warm after 2 hours of running (the tube is cold, but you can first blow it a little, and then drink). Many reflective elements, you can run at night. Inside with a full tank there is a little space for spare clothes and there is a pocket for keys. There is no waterproof pocket, but from the rain will not get wet much, rather from sweat will get wet. In wet weather, all the same for phone and documents need condoms to wear. In Moscow came in 3 days! I took for Nikolo-sloth and Groth so I will soon test the case.
Excellent backpack for hydrator, the quality is excellent. Inside there is a small pocket for keys and other trifles. External pockets are deep, a large smartphone fits with a margin.