My skin is very sensitive and very very acne prone.  I have tried a few Korean toners and so far Pyukang Yul and Whamisa organic flowers toners works well for my skin.  It doesn't cause me to breakout.  My skin doesn't tolerate Klairs products - it clogged my pores and cause me to breakout on my entire face.   This toner can be layered and it is not sticky.  I highly recommend this toner!