Every epic adventure starts with a solid foundation, and the last thing you want to overlook is the first layer you put on. Ultra-comfy, responsibly sourced Merino next to skin helps regulate body temperature, manages sweat, and resists odors, whether you're in Tennessee or Timbuktu. The Smartwool Men's Merino Boxer Brief features smooth, flatlock seams and a wide elastic waistband with Merino lining. Our ultra-soft and durable Merino fabric helps make your first layer your best for every adventure.FeaturesSlim fit is intended to follow the contours of the bodyLightweight Merino jersey fabric uses a recycled nylon core to increase durability while still keeping 100% Merino wool next to skinFlatlock seam construction designed to minimize chafingFully functional flyMerino-lined elastic waistband designed for maximum comfort