Product Details Product Features Overall exterior size approx. 8.5-Inch x 5.5-Inch x 0.75-Inch Fits Rite In The Rain Tactical Field Book (4-5/8-Inch x 7-1/4-Inch ) Dual zipper clamshell opening Interior left: four (4) pen slots plus holder for a Fisher Space Pen Interior right: two slip pockets Exterior 3-Inch x 4-Inch loop field for patches Product Materials 1000-Denier water and abrasion resistant light-weight ballistic nylon fabric Teflon fabric protector for grime resistance and easy maintenance high strength zippers and zipper tracks Triple polyurethane coated for water resistance High tensile strength nylon webbing High tensile strength composite nylon thread (stronger than ordinary industry standard nylon thread) Internal seams taped and finished Paracord zipper pulls Cleaning Instructions MAXPEDITION's nylon fabric is treated with Dupont Teflon for superb water and grime resistance. To clean, simply wipe down with a damp cloth. Allow gear to dry naturally. Do not machine wash. Do not use detergent or bleach. Government Sales All Maxpedition nylon products are GSA compliant and available for purchase at GSA Advantage.