1. SEVIS receipt
2. DS 160 confirmation page
3. MRV fee/Visa fee receipt
4. Appointment Confirmation
5. International passport
6. I-20 (append your signature with blue pen). Below 18 years, kindly get your parents/guardian signature as well
7. Passport photograph American size (2)
SUPPORTING DOCUMENTS
1. Admission & scholarship letter
2. GRE/GMAT/SAT/ACT/IB/A-LEVEL/PEARSON result
3. TOEFL/IELTS/Duolingo English Test result
4. Job offer letter or ID card (saw a transcript where they asked for proof of employment).
5. Statement of account (If you have deficit)
6. Undergraduate/Masters certificate
7. Undergraduate/Masters transcript
8. WAEC results ( WASSCE & BECE)
9. Birth certificate
10. Pay slips
11. Marriage certificate
13. Study leave approval letter
14. Any other document that you judge relevant to your distinct case that will help you but don't give anything unless asked.
As for dressing, what makes you comfortable.