Thanks for writing to us :)
The Lululun Hokkaido Lavender Daily Mask is suitable for all skin type and thus it is suitable to your skin too :)
For the 20% Coupon can apply for all of our products except the products with Daily Deal, Time Sales and Group Buy.
Meanwhile, you can try to get extra Coupon from Qoo10 Event page, in order to get more extra discount.
Please let us know if you have any other question :)