Jump start your cool-weather run or workout with Marmot's Catalyst Reversible Tights. Breathable midweight fabric wicks moisture, dries quickly, and offers stretch mobility for a smooth stride. Reversible, midweight double-knit fabric of polyester and elastane. Breathable, moisture wicking, and quick drying. Ultraviolet Protection Factor (UPF) 50 for sun protection. Flatlock seams for nonchafing comfort and a smooth fit. Inseam gusset panel for increased range of motion. Stretch for increased mobility. Interior key pocket. Reflectivity for safety in low-light conditions. Athletic fit Bluesign approved fabric meets environmental standards