Under Armour Meridian Ultra HR LgTest

21% Elastane: used in combination with other materials, especially for its excellent flexibility - its fiber can stretch up to three times its normal length and then return to its original state.

79% Polyester: A synthetic fibre that is made from polyethylene terephthalate (PET) and is known for its durability, low wettability and ability to dry quickly. Due to these properties, it is often used as an additive in textiles, which improves their performance properties such as shape retention and wrinkle resistance.