Keeps You Cool During heavy workouts! Bandana-style neck wrap uses revolutionary "Kool Crystals" to harness evaporative action to keep you cool! This black wrap has the "Kool Crystals" sewn into a rectangular section. Simply soak the wrap in cold water and the crystals absorb and expand to over 20 times their original size! Wear the bandana as a head wrap, or as a draping neck guard. The "Kool Cystals" will keep you cool during heavy workouts! Hand washable & reusable. One size fits all. Material color may vary! 2" wide, 40" long.