Sheet masks are Korean skincare's 'Sunday reset' essential. One a day isn't necessary - strategic 3-4x/week yields better results than overuse.
Monday (calming): Numbuzin No.3 Skin Softening Serum Mask ($3/ea) - For weekend skin stress, post-drinking skin. 5 min, no wash off.
Tuesday (brightening): Mediheal Vita Lightbeam Essential Mask ($2.50) - Vitamin C + E. Dull skin reset. 15-20 min.
Thursday (firming): DR JART+ Ceramidin Skin Reborn Mask ($7) - Premium, ceramides. Plump, bouncy finish. Before events.
Friday (hydration): COSRX Advanced Snail 96 Mask ($2.50) - Snail mucin bomb. Pure hydration, very safe even for irritated skin.
Saturday (anti-aging): SNP Animal Tiger Mask ($3) - Peptides for over 30 skin. Also fun photo op!
Sunday (deep clean): Mediheal Tea Tree Care Solution Mask ($3) - Blackhead prevention. 10 min, follow with retinol.
Best buying: Olive Young 10-packs often $25-30, Beauty of Joseon bundles at YesStyle, Stylevana variety packs. Avoid $1/ea unbranded masks.