Inclusion Criteria:  STSG donor sites freshly closed not more than 1 month after completed epithelialization STSG donor sites are at least 5 x 10 cm2 in size. STSG donor sites are located on the thigh. Donor sites have not been used previously for skin graft harvesting. Aged 18-65 years Patients who can read and write Thai language Willingness to participate Signed consent form  Exclusion Criteria:  Patients with critical illness (such as systemic infection), major acute illness, or chronic medical illness associated with delayed wound healing (such as poor-controlled diabetes mellitus, end-stage renal disease (ESRD), cancer, or immunocompromised diseases) Patients with mental disorder Patients with active dermatologic conditions such as contractive skin disorders (e.g., scleroderma), psoriasis, or atopic dermatitis After completed epithelialization, patients who used other topical agents or dressings on STSG donor sites within 14 days prior to enrollment Known sensitivity or allergy to sericin, EBN, other constituents in hydrogel sheet, or adhesive tape Pregnancy