LeMieux ProCool Cold Water Boots in Black. The LeMieux ProCool Cold Water Boots are great for use after Cross Country, work or injury to help cool the legs. The Cold Water Boots contain unique water reactive crystals that swell and retain cold when soaked in water and can be re-used multiple times. The Cold Water Boots offer a contoured shape that help to support the tendon and fetlock and also helps to reduce slippage. The Boots feature wide Velcro straps for easy putting on and taking off.