I wanna recomend you the store "SNÖ" (means "snow" in swedish). Its located on Calle Seneca 33, just behind Diagonal.
"Snö carries menswear, womenswear and clothing for kids from Swedish labels like Filippa K, Acne Jeans, Cheap Monday, Whyred, Hope, Rodebjer, Minimarket, House of Dagmar, Rika, Burfitt as well from the store owners’ signature label, Snö. Jewelry and accessories are available from the likes of Cornelia and David&Martin, Scandinavian skincare and hair products from Ole Henriksen and SachaJuan, and household items from Design House Stockholm, Iittala, Stelton, Fafner and ByRedo. No matter what you pick up, you’ll be taking home a sense of Scandinavia."