POC Spine VPD Hydration pack

This Spine VPD Hydration Pack does it all, combining the superior VPD back protector with a hydration pack and extra compartments for tubes, energy bars, rain jacket, mobile phone, keys and repair kit.
Made of VPD (Visco-Elastic Polymer Dough) which fits perfectly to your body and yet provides you with an excellent degree of shock absorption. The VPD material is extremely agile and soft but as energy or force is applied, the material stiffens and becomes rock hard.