10% off apparel. Redemption Instructions Log in to view the redemption instructions for this offer. Participating locations include: 619 Underground Clothing 3030 Plaza Bonita Rd Suite 1362 National City, CA 91950 Phone: 619-267-6199 Map 619 Underground Clothing 631 Parkway Plaza El Cajon, CA 92020 Phone: 619-444-1433 Map Sharing Options Share Offer Copy Link