Arc'teryx W's Rho Hybrid Insulated Bottom

Our warmest Rho base layer pant combines Fortius Air 20 nylon and Coreloft Compact synthetic insulation with Torrent microfleece panels at the lower leg, waistband, and crotch gusset to deliver a high level of thermal performance without bulk. The next-to-skin fit layers easily, and articulated patterning combines with stretch for freedom on climbs, uptracks, and descents.