The Pacsafe Vibe 25 Anti-Theft 25L Backpack is the perfect pack for zipping around town on your bike o catching the tube to work! Made of 210 Nylon Full Dull Mild Oxford, PU1000mm. Zip closure with interlocking zip pullers ingeniously slide on top of one another and interconnect making it harder for pickpockets to unzip your bag and whip out your valuables. eXomesh slashguard panels placed in lower front, side and bottom provide protection against knives and blades.​​