Dr. Denim Echo Jeans in Blue. - size 30 (also in 26, 24, 27, 28, 29, 31) Dr. Denim Echo Jeans in Blue. - size 30 (also in 26, 24, 27, 28, 29, 31) Denim textile. Machine wash recommended. Zip fly with button closure. 5-pocket styling. Rigid denim fabric. 17 at the leg opening. DRDR-WJ240. 2610111L54. Keeping faith in the theory that every day is a denim day, Dr. Denim is a Gothenburg, Sweden-based fashion label that values the power of the perfect pair of jeans. By combining functionality, affordability and fashion, the brand's expansive collection includes not only high-quality denim garments, but comfortable, non-denim closet staples to flawlessly match.