Trickle down is when the styles from high fashion presented on the the runways are adapted by cheaper brands and street styles. A good example of this is the horizontal stripes first seen in the Chanel runways. Since then this trend has been used by many other brands such as Zara and H&M.
Both Zara and H&M have used and adapted the coco chanel stripes in shirts, shoes, trouser, shorts, skirts and even bags. This trend has been show case throughout the years and never seems to go out of trend.
Black and white or even colored stripes are used, pared with jeans or a colourful top, creates a casual but chic look perfect for day and night.
Trickle up
A good example on the trickle-up trend in fashion would be the “Punk Style” trend which originated with the punk subculture of England who often sported dark black leather jackets, military style combat boots, and piercings; they were a subculture based on rock music. The punk phenomenon has become a huge fashion trend amongst the upper class and is still a relevant trend as seen and referenced by many other designers to this day. But one well known and popular designer who is often credited with this is the designer Vivienne Westwood she is often cited as Punk’s creator, but the true origin of Punk is found in England’s depressed economic and sociopolitical conditions of the mid-1970s (The Metropolitan Museum of Art , Price, S., & The Costume Institute, 2004) most prominently on the youth of that generation. I think Vivienne Westwood can definitely be credited as commercializing the “Punk style” into the mainstream and that is a good example of the trickle-up trend because it shows how a designer can take a subculture’s way of dress from the streets and make it popular for the mainstream and the masses and not just popular amongst the subculture where it originated from.
Trickle-up fashion trend is based on styles seen in the streets it is sometimes also referred to as the bubble-up pattern. The trickle-up theory is the newest of the fashion movement theories. In this theory the innovation is initiated from the streets and adopted from Lower class income- groups. The innovation eventually flows to Upper class-income groups; thus the movement is traveling from the bottom up (Theories of Fashion, 2010). I think for many years now and especially for the designers in the 21st century they participated in this theory by having drawn inspiration and incorporated styles based in the streets into their collections making it more mainstream and acceptable amongst the masses.