The Sedici T2 Sicilia Backpack is constructed from 2320 denier hypercore plus fabric and features a 4-point adjustable harness for a secure and comfortable placement.; 2320D hypercore plus construction Reflective piping and trim Rubber carry handle Dual-buckle padded harness with 4-point adjustibility Vented and padded backing Padded internal laptop holder Helmet carrying system: external helmet carrier Dimensions: 18" L x 11" W x 10" D