Black nylon AmeriBag Healthy Back Bag Size: Medium Many, many pockets Excellent shape Description: Distressed Nylon is hardwearing, machine washable and very lightweight. The fabric has characteristic tonal and textural variations which gives the bags a casual, relaxed look (ameribag.com). Material: Nylon Size: Medium Dimensions: 19 x 11 x 7" Capacity: 9 liters Weight: 0.86lbs