5 oz., 100% cotton canvas; Drawstring backpack featuring adjustable Cotton cinch-up closure; Reusable cinch bag made of 100% Cotton fabric; Adjustable soft Cotton rope shoulder strap doubles as drawstring closure; Machine wash on delicate cycle only; Recommended hand washing all imprinted products; Recommended weight tolerance: 11 lbs; Product Size: 15.675 w x 16.75 h