(By Kate Carlisle) Milan, April 19 - Fashionistas have been given their marching orders, or call to sparkle, for the 2013 summer season. After a long and muted winter, the shine is back for both men and women, but unlike the last two summers, this year's glow is not as much in the color as it is in the threads, sequins and lame' fabrics. Hot-weather wardrobes are injected with a psychedelic feel, chrome color combinations and a tailored fit in the case of Emporio Armani. His women's jacket-shorts combo comes in golden cotton or shiny deep reds, and are completed with a silk organza overcoat embroidered with iridescent sequins. Dresses, peddle-pushers, shirts, bombers and bomber jackets are illuminated with lumex threads sewn into every fold. The longing for light segues into the evening with bolder colors, decisive lines and more binding, floor-length skirts. Viktor and Rolf have come up with a draped sarong adorned with a prominent bow while Blumarine often turns to orange for its powerfully hued suits. Just to make carefree movements or even some wild dancing easier and more theatrical, clothes are lit up with sequins, like those by designers from Etro or micro-metalic threads as by Salvatore Ferragamo to give a powerful optical punch. This summer's shine is not for the timid, nor is it confined to the usual glitz of evening wear. The season's must-have item is an authentic harkening back to the go-go days of shimmer - hot pants. Whether they are made with spangles as with Guess Jeans, metallic tassels and even paillettes like Drome suggests or high-tech fabrics as with the Adidas line by Stella McCartney, the important thing is to have at least one model in the wardrobe. By the same measure, men will not be out shone. Fashion houses have honed in on men and made sure they won't be playing second fiddle to female radiance. Laminated leather trench coats in pea-green super-tech fabrics by Burberry Prorsum and leather bomber jackets Jet Set for women are equalled by Channels silk brocade jacket for men. As it often happens in the world of fashion, to move forward sometimes designers take a step back. This summer's psychedelic spirit sings of today's extravagance by contemporary singer Lady Gaga. However, it also pays homage to the eccentricity of the 60s and the glitz of David Bowie, whose unforgettable studded shoes and iridescent jackets are on display next to the artist's memorabilia at London's Victoria and Albert Museum.