AmeriBag Healthy Back Bag&reg; Medium Cotton Canvas (Natural Tan) 18 double-zip entry into main compartment 32 non-slip adjustable shoulder strap is 1.5 wide and has a leather underside at the shoulder for comfort and grip 10 front exterior flap closure pocket secures with Velcro The well-organized interior features many well designed pockets including a water bottle pocket, two pen sleeves, three slide pockets of various widths for a cell phone, PDA, or eyeglasses, a 10 zip pocket and a key fob Signature easy-see silver lining