Diesel continues its exploration of circular fashion with Episode 7 of Behind the Denim, titled Don’t Fall Apart. Host Lea Ogunlami returns, this time stepping into the Diesel Lab with OTB Sustainability Ambassador Andrea Rosso. The episode centers on quality control and the specific techniques Diesel uses to keep its jeans intact over time.
Inside the lab, machines and tools fill the space, each one serving a purpose in Diesel’s fabric testing process. Lea observes firsthand how Diesel puts every swatch through a series of inspections before jeans ever reach store shelves. The team uses a spectrophotometer to compare the color of each swatch to its standard sample. This helps avoid inconsistencies across production. Nearby, a dynamometer evaluates each fabric’s strength and elasticity, determining whether it can handle everyday use without wearing out too soon.
Diesel doesn’t rely solely on machines. The brand builds its jeans with features meant to reinforce and prolong wear. Triple-stitched seams prevent sudden tears and help keep panels aligned. Pockets receive additional strength with shoe thread, a material often found in heavy-duty footwear rather than apparel. Diesel’s designers also apply double belt loops to reduce stress points and line each waistband to help the jeans retain their shape.
Andrea Rosso explains the reasoning behind these features to Lea, connecting each technique back to Diesel’s goal of building jeans that last. In a fast-moving industry, Diesel chooses to test and retest its materials with industrial precision. Color matching, tensile testing, and reinforced construction all play a role in the lifecycle of the product.
As Lea navigates the testing equipment, she gets a sense of the level of scrutiny each material endures. At each stage of production, the team checks that the denim holds up against pressure and stays consistent in color. Every step reduces the chance of future failure, whether that means unwanted rips or faded hues that don’t meet the original design intent.
Don’t Fall Apart gives a clear picture of how Diesel backs its circular messaging with lab work. Every zipper, stitch, and seam must pass inspection before it goes public. The series will continue with Episode 8: Dish the Dirt, which shifts from construction to care.
