For medium to long trail runs where agility is essential, this stretch-fit belt moves with the body and provides easy access to soft flask hydration and essentials. Soft, stretch belt compliments the soft backing of the pack. Longer wings and stretch belt rest comfortably on the hips. Keep hydration flasks close and easy to grab. Weight: 140. Pack weight (LB OZ)5.64 oz. Pack weight (G)160. Material: Nylon, Elastane.