Yoga Fabric

Nylon
This is one of the most common yoga fabrics. Nylon is a soft, mildew-resistant, quick-drying, and stretchy material. It flexes effortlessly with every movement and returns to its pre-stretched shape and size without breakage. The yoga fabric is highly breathable and allows cool air to penetrate into the skin.
It can also wick away sweat from the skin and through the fabric to the outer layer where it evaporates. Thanks to its unique traits and its soft-as-silk feel, it's found in almost every sportswear, ranging from tank tops, leggings, sports bras, T-shirts, and performance underwear.

Spandex
Other than the original name, it is also called by the brand name “Lycra.” Spandex is very flexible and stretchy, which is why it's largely used as a weightlifting and yoga pants material, as well as in other workouts that require a wide range of motion. Spandex clothes are commonly in skin-tight apparel, such as tracks shorts, sports bras, leggings, boxer briefs, socks, and customizable compression shirts because of their superelastic qualities.
As a flexible yoga fabric that can stretch as much as eight times its usual size and return to its original size, spandex permits unrestricted and comfortable movement in all patterns.

Poly-Dri
Think of this as Polyester 2.0. Standard polyester is not so much appreciated as it traps bacteria and doesn't repel odor very well. It is also durable and doesn't wrinkle as fast as other workout yoga fabrics.
This yoga fabric is the workhorse of fitness apparel. It's used in making almost all the activewear available in the store. Thanks to its tightly woven structure, it has the capability of protecting against UV rays. According to a blog published by Skin Cancer Foundation, it prevents the sun's rays from hitting the skin.

Merino Wool
The popular belief is that wool is a cold-weather yoga fabric that keeps the body warm. While this is true, wool is also a great warm-weather yoga fabric. Merino wool in particular is a good sweat-wicker that's thinner and softer than standard wool.
Merino wool performs a dual function. When it's cold outside, the crimps in the fibers trap the warm air coming off the body. When it's warm outside, the fiber wicks sweat away from the body and through the fabric.
It's hard to find much activewear made of purely Merino wool. It's mostly used with other fabrics like polyester for softness and breathability.

Polypropylene
Polypropylene is made from plastic and is totally water-resistant. It's an outstanding yoga fabric that forces moisture to pass through its fibers, pushing out to the fabric's surface for evaporation. Even after being sweaty at the completion of a long marathon, only the outside of the clothes will be wet. The inner side touching the skin will be completely dry.
Polypropylene is also very durable and resistant to wrinkles. It ensures a comfortable feel during and after a long, sweaty workout.

Bamboo
Bamboo pulp produces a natural fabric that's light, breathable, and has an anti-static nature. This yoga fabric is super soft, wicks away moisture, repels odors, and regulates body temperature. Like Merino wool, bamboo is often used with other fabrics.
One of the best attributes of bamboo fabric is that it's environmentally sustainable and durable, ensuring that it's worn severally without fading. Also, since it's made of natural fibers, it is hypoallergenic, causing less skin irritation after sweating.
It's a highly-rated fabric, making it more expensive than other popular options. However, it has a lot more benefits to offer than other fabrics.

Tencel
It's a natural fiber, offering anti-microbial benefits with a smooth finish. Similar to bamboo, TENCEL is obtained from sustainably sourced wood pulp. And the workout material is very close to polyester in structure, making it have a luxurious texture and super durable.
It's not only breathable and biodegradable but also contains tiny fibrils that make the fabric capable of wicking sweat.

Moisture-wicking Cotton
Because cotton is considered to be incapable of wicking moisture, fitness experts and researchers created Moisture-wicking Cotton. It's an alternative made from a cotton blend of synthetic fibers. While this fabric does help to absorb sweat more and doesn't cause hotness, it is advisable to wear it sparingly, especially if higher temperatures are forecasted.
This yoga fabric is perfect activewear that can be worn daily for activities that won't result in a lot of sweat.

Ventilation – Are your pants allowing adequate air to pass through? During your workout, optimal air circulation is necessary to keep you dry and comfortable.

Moisture Absorbent – Do the pants soak up perspiration from your skin? Your pants should be made of a yoga fabric that moves moisture away from your skin, letting it evaporate out.

Quick Drying – Will your pants stay damp if you perspire? You won't want your workout affected by feeling weighed down or uncomfortable due to sweat. Therefore, a rapidly drying material is desirable for yoga pants.

Comfort – How does the material feel against your skin? If you're planning to run in your yoga pants, you'll prefer a yoga fabric that's gentle on your skin. Ill-fitted pants may lead to chaffing, which is certainly undesirable. Consider whether you might require compression or additional support in your pants.

Opacity – If you're doing squats in your yoga pants, do they become transparent when stretched? A yoga fabric that's too thin could cause this issue. Ensure your yoga fabric choice is thick enough for the activities you'll undertake.

Flexibility, Non-Constrictive – The best stretch is when you can fully stretch without causing damage or distortion to your pants. Full mobility is a must in yoga pants, particularly if you'll be practicing yoga. Your pants should also be unrestricted to facilitate a great workout.

Perfect Fit – Your pants should contour your body and be flattering. They should also stay put during your workout. Nobody wants to be continually adjusting their pants during exercise.

Resistant to Odor – Is the yoga fabric antimicrobial? Some materials naturally resist odor-causing bacteria, keeping you smelling fresh. If that's important to you, opt for a yoga fabric with these properties.

Long-lasting – Yoga pants should be thick enough to withstand any stress you put on them. If you'll be outdoors, they'll need to withstand any potential weather conditions. If they'll encounter the ground, they should resist wear and tear. Some yoga fabrics even provide some degree of water resistance, which might come in handy if you plan to hike in your yoga pants.

Light in Weight – Even if you'll be wearing your yoga pants in cold weather, they should still be lightweight. The lighter your pants, the more mobile you'll be during your workout.