The TR 40 not only perfectly fits all the needed tri day essentials. It functions with multiple storage pockets, adjustable helmet straps at the front, and a ventilated storage compartment at the bottom for wet garments. With an ergonomic ventilated back, sternum strap, waist buckle, and ventilated shoulder straps it also functions on the go. Removable waist band. Mini light rubber tab. Reflectors: Enhance security. Adjustable elastic drawstrings: For mat transport. Ventilated bottom storage compartment: Isolates humid garments. Size L x H x D: 36 x 54 x 26 cm : 13 34 x 20 34 x 10. Full capaciy: 40 L 2441 CU. Bottle not included. Ergonomic back with ventilated zone and padding: For excellent comfort and enhanced ventilation.