Finding the right fitness apparel depends on the activity you plan to do. You should also consider whether you plan to exercise indoors or outdoors. The time of year makes a huge difference and of course your tastes and preferences.
No matter what activity you're planning, there's one key thing to keep in mind. Fitness clothing should be flexible. It must be stretched. The waistband should not be rigid. There should be no tight seams that limit movement.
Knitted fabrics are generally more flexible than woven fabrics, and thus are the most popular type of fabric for fitness apparel. A simple cotton knit may be appropriate but it tends to lose its shape after a while.
You need your comfort colors t-shirts to stretch and then regain their shape. Specialized fabrics are designed to do this. There is usually a percentage of Lycra in the thread to give it more stretch and enable it to regain its shape.
Sometimes an old cotton sweater is all we need for a relaxing workout. But cotton is poor at wicking sweat. Cotton tends to absorb sweat. For heavy exercise, wear clothes made of materials with good wicking properties. Modern fabrics are designed to do this and are far superior to cotton when it comes to keeping the body cool and dry.
Cotton comes alone in exercises such as yoga. Leggings made of soft fabric can make some yoga poses difficult. A pair of loose-fitting cotton pants may be more appropriate for yoga practice.
You need a good body to wear revealing fitness clothes. But if you want to hide extra pounds, choose something that covers the body. Don't go for a loose fit. The loose-fitting garment will simply twist and get in the way while you exercise.