Blemish and hyperpigmentation treatment reputation
Multiple reviews cite buying the product specifically for its known effectiveness at lightening blemishes and addressing uneven skin tone, with consumers mentioning they were 'worried about blemishes' and sought this solution.
Brand loyalty and product line expansion
Repeat customers note they 'always seem to be fine with ISOI' and have successfully used other products in the range (green and blue variants), motivating purchases of additional masks in the series.
Promotional pricing and value perception
Several reviewers mention purchasing during sales or because they found the essence product at a 'reasonable price,' with one noting they bought 'several packs' when discounts were available on Olive Young.
Influencer or word-of-mouth recommendation
One review explicitly states 'I heard it was good so I was looking forward to using it,' indicating social proof and recommendation-driven purchasing.
Rich formula and generous product quantity
Buyers appreciated the 'large amount of ampoules' and abundant serum content compared to other mask packs, viewing this as justification for the premium price.