Large main compartment with easy access to contents, removable waterproof liner. Large enough to hold a laptop. Removable 1.5 litre drinking bladder. Ripstop polyester construction. Reflective piping. 180 degree water resistant zips. Padded breathable shoulder straps with quick release attachments and change pocket. Straps buckle across chest -keeps it secure. Extra storage in two side pockets. Padded breathable backpad. 3 compression straps for stability. Helmet carrier folds out of base. Convenient carry handle. Netting pocket. Bungee section.