Instant cooling relief - run under water for one minute or until saturated, wring out excess water for drip free cooling. Long lasting - can last for up to 4 hours on a single soak - simply re-wet to increase cooling duration. How it works - cooling PVA material absorbs water and creates a cooling sensation as it evaporates. Reusable and machine washable - air dry until material is stiff, re-wet until soft, machine washable with mild detergent, air dry only. Heat stress prevention - reduces the effects of heat exhaustion and fights fatigue while working or playing in the heat - can also be used to help bring down fevers, hot flashes or night sweats. Sizing - 13in x 29.5in/33cm x 75cm. Chill-Its Gray Pva Neck Wrap (One Size Fits Most) | 12438