The NEW eco formula Barmah Waterproof and Conditioning Spray (water based) has been specially formulated to use on any of our leather or suede hats, without making them change their appearance (like other products might do). As its' name suggests, it waterproofs and conditions the leather, so that your hat stays in tip top condition and your head stays dry. The leather and suede hats are a natural product and they will dry out over time so we recommend applying the spray all over the hat every couple of months. The new bottle is a recyclable aluminium bottle with a trigger spray for easier application and now contains 150ml.