VERSA Fabric: Hands down, no contest. We've raised the industry standard for technical Midweight perfection. Mindfully developed by BlackStrap, VERSA is Breathable, Moisture-Wicking and contains 4-Way Stretch for optimum maneuverability. Versa is Quick-Dry, and has Odor-Free properties to keep you smelling fresh. DRI-FLO Moisture Wicking: Unlike traditional fabrics, which trap sweat between the skin and your clothing causing you to feel hot and uncomfortable, BlackStrap's Dri-Flo system is a Moisture-Wicking technology designed to ensure your sweat evaporates from your skin allowing for optimal temperature regulation. VENTRA Breathable System: Meticulously fabricated and strategically placed in critical areas of our garments to allow air movement where your body sweats the most. Designed to Moisture-Wick at a high degree keeping your temperature regulated so you can stay active longer. The Summit Base Layer Pants features a soft-flex waistband, fly, and flatlock stitching. Breathable, 4-Way Stretch, Helmet Friendly, Moisture-Wicking, Abrasion-Resistant, Thermal-Regulation, Odor-Free, Quick-Dry, Lens-Safe, SpectraUV, Finish Seams, Soft-Touch, Machine Washable/Dryer Safe