Purpose-built from the ground up to offer users First Lite's lightest weight next to skin layer with distinct advantages over traditional synthetic base layers. The First Lite Men's Yuma Boxer Briefs represents First Lite's approach to offering a performance-oriented synthetic base layer option, in tandem with the Merino base layers the brand has become synonymous with. Yuma offers 3 distinct benefits, 37.5 Active Particle Fibers to wick sweat and dry the garment, HeiQ Pure Antimicrobial to hinder bacteria growth and odor, and Burlington No Fly Zone to actively repel insects and ticks. Built to create a comfortable advantage no matter the pursuit, especially across the warmer months. Features115gm lightweight poly constructionDot Matrix fabric allows cooling airflow37.5 Active Particle Fibers for moisture management and quick drying timesHeiQ Pure Antimicrobial hinders odor developmentBurlington No Fly Zone repels insects and ticks