I love clay masks ,I find them to be very purifying especially the Freemans clay mask.
Firstly I have to say that the smell is lovely . Make sure you cleanse your face properly before applying the mask . I find that I don't need to use too much as it's very spreadable.
Whilst on my face it feels absolutely soothing and the cooling effect is great too. Once washed off my face feels fresh and very smooth not to mention impressively purified.