Choose any brand that offers certified ethical sports clothes. They won’t give you rashes or irritation. This is from my personal experience. I’ve bought a couple of yoga leggings and organic cotton bras from Satva and I love them. They’re GOTS certified organic cotton and doesn’t use chemicals. The colors are beautiful and the organic cotton feels soft and comfy on the skin.
Below given are some of the best. Do check them out-
Under Armour : They have a huge collection of men’s and women’s sports wear.
SATVA : They sell only women’s fitness wear. Sustainable materials like organic cotton and recycled polyester are used. Soaks sweat easily and comfortable.
Adidas : Great place to shop if you're on the hunt for sportsgear. High quality but a little expensive.
Athleta : Thick material, comfortable. Good return policy
Lululemon : Lululemon isn't cheap but if you love bright colours and designs then this is one for you. The quality is also good.