Reference: 394004 If having even the best fitting hydro pack still annoys you on a long trail run, the SENSE HYDRO SET is an ideal alternative. The choice of many top athletes, this innovative solution wraps any size soft flask into the hand, so you don't have to grip it, but also compresses as you drink. Sold by the pair, with a 250ml flask. Technologies Fabrics PVC free Elastic Power mesh Fast wicking fabrics Terry 3D Air Mesh Back systems Sensifit (hand) Carrying system Extra light flask carrier Hydration Soft flask included *1 (250ml/8oz) Security Reflective Benefits Convenience It fits in your hands, but you don't have t hold on to it. And hydration is instantly accessible. Lightweight Incredibly easy to carry, this shrink while you drink hand carry system is all about speed. Comfort It wraps around your hand, so your hand can relax. And a light squeeze gives you instant hydration.