Flash 0.75 is a low Lycra 3/4 tight providing an athletic fit with minimal moisture absorbtion. Flatlock seams are used for a smooth comfortable finish and silicone leg grips hold for perfect fit at the top of the calf. Mesh panels behind the knees provide great ventilation to keep your legs cool and dry when working up a sweat. 4-way stretch material provides brilliant durability and flexibility that lets your body move without restriction. Stretch Polyamide (18 Lycra) yarn is high-wicking though not cool-to-touch which can be a discomfort with some close fitting leggings. A good size angled mesh thigh pocket can take map gels etc without bouncing against the legs.