Denim comes in all shapes and sizes; from skinny to slim fit to bootcut. We wear it while gardening, to work or to an evening soirée. But in 2014, denim sales in the US dropped by 8%, as activewear grew by the same amount. How can denim brands stay relevant in the age of the yoga pant?

Now that athleisure is a bona fide style movement, you can fashionably leave your house in yoga pants. Whether we like it or not, this trend is here to stay, as Americans have gotten too comfortable in their socially acceptable sweats to give them up anytime soon.

Yoga products are worth $27 billion annually in the US. And while it's true that the number of people practising yoga – predominantly women – has increased by 20% in recent years, that doesn't explain why sales of yoga wear are up 87%. Are yoga pants set to become the next Levi's 901s?

One third of shoppers say jeans are the hardest garment to buy because it's very difficult to find the perfect fit. Offering 400 sizes, start-up Qcut promises a product that will fit 99% of women, disrupting the apparel industry and destroying one-dimensional body image ideals.