Elite survival - Elite Survival Systems Marathon EDC GunPacks

I bought the running gun pack so I could carry my larger cell phone comfortably. I live in Florida so I liked the idea of carrying some fluids. The pack appears to be very well made. The gun pack will carry a small 380 etc. However after filling the small water bottles with fluids and the belt adjusted I tried a trial run, Because the entire belt is elastic, it slipped off my waist. I had to adjust the belt to its smallest setting possible leaving about 12 inches of belt left on each side hanging. I haven't tried running with it again yet. I would have preferred the belt have some flex but not 100%.