Please note that these are high compression pants and they will feel small but are actually made like that on purpose.
It keeps the muscles warm to prevent muscle strain. When the right amount of compression is used (will vary depending on body area, typically in the range of 10 to 25 mmHg), improving venous return and oxygenation to working muscles
It wicks sweat away from the body to prevent chafing and rashes
Helping relieve pain from muscle stiffness and soreness
Reducing the time taken for muscles to repair themselves