It is true that nowadays the market is abundant with every type of clothing from harem pants to see-through plastic jackets. This raises the questions of what items you actually need to invest in and which ones you can leave behind. Although sweatpants and workout leggings have the 99% likelihood of already constituting a part of your wardrobe, a pair of yoga pants might be a smart addition for many reasons. While sweatpants are great for lounging around and running errands, workout leggings merely serve the purpose of gym training. Neither one of them is great for a yoga session that can transition into a coffee house meeting with friends afterward. Yoga pants, however, come in handy in these scenarios more than any other type of pants.
Their material is not as thick as one of sweatpants, and they do not have as much elastane as the workout leggings do that makes them look glassy. There is also no drawstring involved and thus no chance of your pants falling down from your hips. Stretching and yoga poses are easier done while wearing a pair of yoga pants due to their lightweight construction that fits like your second skin. You are able to execute more challenging poses and headstands without easily getting sweaty and then run your errands without having to change in a different pair of pants. So yeah, you do need a pair of yoga pants even if you already have sweatpants and workout leggings sitting on your closet shelve.