The Ibex Men's Woolies Pro Tech Boxer Brief is our lightest weight base layer, designed for superior comfort and performance in cool to cold conditions. Utilizing Nuyarn technology, these boxer briefs are 35% more thermally efficient, 85% more elastic, and 8.8 times more durable than traditional ring-spun merino wool. They feature a super soft, no-ride elastic waistband and flatlock seams to reduce chafing, providing all-day comfort. The nylon core enhances durability, while the two-way fly adds practicality for everyday wear.