Stance Fever Trip Boxer Briefs. For unrivaled comfort, this fitted boxer brief showcases Stance's 'Butter Blend' milk fabric. Especially soft, this proprietary fabric soothes the skin, it also stretches and offers enhanced breathability with odour resistance. A dual layer pouch and fly provide support without compromising comfort and accessibility. To eliminate friction and better match your moves, the Fever Trip features feather-seam panel construction and a core-flex waistband.