Our new innovative 3.1 seamless XO-Underwear has proprietary and highly breathable “mesh” designs throughout the garment which allows perspiration to quickly pass through in vapor form. Nothing wet against the skin! This garment offers 3D body mapping with lightweight, compression zones for greater range of movement in the thighs, buttocks, hips, quads and calf areas for targeted skeletal support. We even went the extra mile to include a unique XO-Waist Band with “two-way” stretch providing more flexible waist support and belly comfort. Weighing in at +-3.5 ounces it is the lightest performance long underwear on the market. Great for ultra running, football, baseball, basketball, soccer, back packing, work, military, police, and almost anything life can throw your way for work, hobby, play or professionally-XO-Underwear can handle.