The leggings should be tight, but not too tight. The UA Armor Fly Fast provides exactly that and much more.

• Soft, quick-drying fabric that supports for a locked-in feel designed to sweat
• HeatGear fabric with added stretch provides exceptional coverage with minimal weight, wicks away sweat, and dries quickly
• 4-way stretch material moves better in every direction
• Strategic laser perforations for additional breathability where you need it
• Built-in elastic waistband with internal drawcord for adjustment
• Side pocket with ankle zipper for easy application