Brand trust and repurchase
Many buyers explicitly cite prior good experience with COSRX products or say this is their 2nd-4th repurchase of this exact sunscreen.
Fungal-acne-safe formulation
A large number of reviewers sought out this product specifically because it is fungal-acne-safe, having struggled to find suitable sunscreens elsewhere.
Influencer/word-of-mouth recommendation
Several reviewers mention purchasing after a YouTuber or friend's recommendation, including named beauty influencers in Taiwan and elsewhere.
Value of the double-pack set
Reviewers highlight that the 2x50ml set offers good value and stock-up convenience for a product they go through quickly.
Gifting
Multiple reviewers bought it as a gift for spouses, mothers, daughters, or friends, citing its gentle, universally likeable texture.