The AED pannier has a pocket measuring 14"H x 34" in circumference which is sufficient room for practically any AED on the market. Four clear vinyl pockets on the flap for miscellaneous supplies. This is a right side pannier because most bikes would fall to the left of be laid down on the left, thus protecting the AED. Made of 1000 denier Cordura® nylon, the back side of the bags are nylon reinforced vinyl for easy cleaning and have self-repairing #10 YKK nylon zipper with a storm flap. White 3M™ Scotchlite™ Reflective Material and a star of life. Measures: 15"H x 12"W x 7"W for 1250 cu. in. of space.