Backpack Is 23 Liters (45x33x14 cm) and is made of Rip-Stop Texture, 100% Water Resistant Polyester. Inside Phantom you have 2 loop tapes of 25x25cm which you can patch velcro pockets or any hookable item, 2 velcro pockets are supplied in the bag's price and tana bana can be bought seperately in the bundle option. Backpack is Water-Resistant with 2 layer protection of main compartment. YKK/SBS Branded Zippers are applied all over backpack which gives user no worries of getting damage ever and in this version you also get Alpinebear marked pullers too. Inside the Bag you now can add upto 17" Laptop and 12.9" Tablet too. Backpack Only weight 750 Grams and is extremely light weight and super durable. Front Mesh Compartment contains a secret cash pocket, mobile charging pocket, along with key holder too, now you get lockable sliders on front mesh compartment too. 2 Bottle pockets on outside with soft handle on top.