JBL's Official Cover for Your EON Speakers Keeping your speakers protected can make or break a gig. Sweetwater recommends keeping them safe with this EON cover bundle. These twin covers give you solid protection with 210D polyester interior fabric, lined with 10mm foam padding. Handle cutouts make for easy transport, and a water-resistant 600D polyester exterior keeps your speakers safe from water damage. Keep your speakers in great shape with this