The Anatomica is Icebreaker's signature men’s boxer brief. This model features a fly integrated into its contoured and comfortably supportive front pouch. The Anatomica is made with a blend of soft and breathable merino wool infused with Corespun nylon for strength and LYCRA® for stretch. Corespun fabric uses nylon fibres wrapped in merino wool for increased durability that still maintains next-to-skin softness. This boxer brief also has flatlock seams that eliminate chafing, improving the comfort of its snug fit.