These pouches are made of 1000 denier nylon with all edges bound and closed with #9 YKK zippers and dual sliders with silent zipper pulls. They attach directly to our 3-Day Assault Pack (603D00), Phoenix Pack (60PH00) or the BLACKHAWK! Special Operations Medical Pack (60MP00.) It is designed with dual adjustable cinch straps for absolute custom fit. They also fit HydraStorm Cyclone and Force 5 ! Wt: 6 oz. Note: pouches are sold individually.