EMS Backpack has two large frontal pockets that measure 10"x13"x3" and the lower pocket has elastic loops on the inside. The upper pocket comes with a zippered pouch on the outside. Side features two pockets 19"x7"x4". Pocket on right comes with dividers and pocket on left comes with 4 standard size removable pouches. Inside large pocket are three large utility pouches and one extra large utility pouch. Bottom of bag has a strap for a 'D' Cylinder. Molded feet on the bottom provide extra protection and a handle on top allows a one-handed carry. 13"x16"x25"