U-locks are great for bicycle security, but they're not always convenient to carry while you're riding. Enter the Litelok Flexible Bike Lock. Offering the strength of a U-lock, this strong bike lock is easy to bend so you can pop it in your bag while you ride. Moreover, you can even wrap it around your waist for easy carrying as you pedal. Available in two ranges—Gold and Silver—this flexible bicycle lock comes in Boa Green, Crow Black, and Herringbone colors. Additionally, these are lightweight bike locks. In fact, the Gold series weighs just 1.1–1.4 kilograms, while the Silver Litelok series weigh 630–830 grams. So you'll hardly notice the added weight in your backpack. Plus, all you have to do is choose the option that coincides with your bike's value. Considering these locks offer up to $13,500 in theft protection, you're probably good.