KUHL. 5109WA. RADIKL PANTS. WALNUT. An idea so bold we call it RADIKL. The K HL RADIKL Men s Performance Pant feels as comfortable as a sweatpant while staying durable enough for anything mother nature throws your way. Whether it s blistering hot hikes or bone-chilling descents you ll be set with pants made with ENDURO FABRIC that provides unparalleled year-round performance. Get yourself a pair of pants made for the bold.