Technical trail bag, lightweight, comfortable, and clever. Its main zippered pocket has a compartment for a hydration bladder and an inner flap pocket. Without any unnecessary extras to weigh you down, it will be your best partner for long-distance endurance runs.Breathable mesh inner vest1 main compartment for a hydration bladder + 2 tube openings1 inner zippered flap pocket2 front pockets for 500mL soft flasks4 front pockets for bars, gels, etc.2 zippered front pockets for smartphone1 easy-access expandable rear pocket4 carry options for poles2 chest strapsWhistle + reflective zones front/rearMaterial: PA Polyester