Ronhill Trail Tempest Waterproof Running Pants Fully Waterproof - 10,000mm hydrostatic head. Fully waterproof seams and waterproof zips. 2.5 Layer Hydrophilic Lamination - Hydrophilic lining relies on the behaviour of water molecules, so heat generated by the body inside the garment drives water molecules to the external surface. As well as being waterproof, it also vents hot air and sweat, keeping you cool. 1/2 Length Zips with Adjustable tabs - For easy on and off as well as a customisable fit. Articulated Knees - For excellent flexibility and range of motion whilst running. Reflective Graphics - Small reflective graphics are incorporated to maintain your visibility in low light conditions.