BLQ BASIQ Long Sleeve Swing Dress in Black. - size 0 (XS/S) (also in ) BLQ BASIQ Long Sleeve Swing Dress in Black. - size 0 (XS/S) (also in ) Cotton blend. Unlined. Jersey knit fabric. BLQB-WD53. DAS160. For basics that were made to be lived in BLQ Basics makes the cute. Strong lines, rich fabrics, and ultimate style make up this must-have line.