The DU/ER Tech Fleece Denim Straight Pant interweaves fleece fibers directly into the denim, delivering real warmth without the bulk of a base layer underneath. A DWR treatment adds single-layer weather protection, so classic jeanswear style holds up against cold and damp conditions on its own. What Our Gearhead(R) Experts Are Saying:"I wore these through a cold, damp commute without any long underwear and never reached for another layer the whole way. The gusset meant I could still bike and crouch without the denim ever pulling tight."