The rongbuk 28 features a smaller outer pocket with just a strap and buckle over the top for those things you need to access quickly. Larger middle compartment with a zippered top to secure items, and a large main compartment for clothing or other bulkier gear. Inside the main compartment is a sleeve that can hold a hydration system, a tablet or small laptop. A fleece lined garage for your sunglasses or cell phone is at the top of the pack.