This is a facial sheet mask from one of the most popular face mask brands Lululun. 
 
The blue lululun is a highly moisturizing type of daily face sheet mask. It hydrates your skin with thick moisturizing lotion. 
 
Lululun suggests you "to mask lotion" everyday instead of putting it on with your hands. So they offer big quantities of face masks at reasonable prices. This small pack is for trying the first 7 days.