The Black Ice Cooling Neck Wrap is truly a product like no other. It was designed to solve the problems of existing products that rely on water or gel/starch based ice (too cold and melt too fast, drips on the user), or evaporative cooling bandanas or cooling absorbent rags (last a very short time and have to be constantly re-dipped in water, or get soggy and drip on the user). The Black Ice neck wrap does not drip on the user, is very cool, but not too cold, does not get soggy, and lasts much longer than typcial products. Besides being light weight, comfortable and attractive, it has a powerful ability to draw heat away from one's body. The most popular arrangement customers use is the twin pack system. This enables them to wear one pack, while re-chilling the other in a cooler or fridge. Swap the packs out as needed to provide a constant, wonderfully refreshing cooling sensation for many hours. Athletes in numerous sports wear the product either while they play (based on preference and comfort level) or between holes in golf, games in tennis or pickleball, or between reps or sets in weight lifting or cross-fit. Also great to wear while jogging and biking on a hot day. Makes a massive difference in your workout by providing a constant cooling effect. Also great for HVAC workers, highway and construction workers, landscaping professionals, virtually anyone who works outside in the heat. Get hot mowing your lawn? Keep one pack in the fridge and wear one while mowing - swap as needed - you'll be amazed how cool you can be for the entire day!! Neoprene wrap is machine washable, but do not put in the dryer. Lay flat and air dry. Coolant packs can be hand washed with dishwashing liquid and air dry. Do not place packs in microwave. Tough and durable; designed for many years of use.