CompCooler UniVest ICE Water Cooling System, Outer Wear Design, Water Proof and breathable fabric, 3D interlayer, Cooling Channel Liner, 3L Freezable Quick Release Bladder, Comfortable Body Cooling Performance.Compcooler Univest ICE Water Cooling System (UICS) combines ICE water circulation Unit and liquid cooling vest as one vest, this significant improvement provides a better wearability for end user. UICS includes 3L Quick Release bladder, Mini pump, Rechargeable battery and Liquid cooling channel embedded on mesh liner. Mini pump circulates cold water and continuously flow around your body, it will keep user cool and comfortable in hot conditions. Water proof 5000WR and breathable 3000MVP outer fabric, black and beige Color, 3D Material Interlayer, double lines stitching cooling channel, better skin touch feeling, less load sense, comfort to wear, easy to clean. 2-4hours cooling from 3L frozen bladder, 1-3 hours from ICE cubes, Quick release design, easy to replace and extend cooling time, 7.4V 2200mAh rechargeable battery provides up to 10 hours operation. Cooling temperature range 36�F-68�F (2�C-20�C), Noise: 48dBA, Vest size: XS/S, M/L, 3XL/4XL, sides adjustable device provides stretch 15cm/6" Max to keep body fit. Ambient 0�C-60�C (32�F-140�F). This model was designed for outerwear application. (Note: M/L size fits regular body size from M to 2XL)Features:Univest Combine ICE water circulation unit and liquid cooling vest as one vest, easy body cooling operation, better vest wearabilityOutwear Ergonomically Cooling Design, front zipper with sides adjustable device, keep body fit, comfortable to wear, 3D Interlayer less load senseWater proof 5000WR and breathable 3000MVP outer fabric, Double stitching cooling channel mesh liner, better skin touch feeling3L Freezable quick release bladder, Quick body cooling, easy to replace by quick fitting and extend cooling timeExtreme Cooling Performance 36�F-68�F, Well-distribut