This winter season, denim authority Levi’s is expanding its Performance Warm series with new additions of Thermolite technology garments. The functional line features textiles woven with patented Thermolite fibers that will lock in body heat to promote insulation and warmth. The advanced technology allows the garments to remain lightweight with minimal bulk. Highlight pieces include the winter-updated jean jackets that are lined with wooly textiles, camouflage jackets, puffers and staple Levi’s denim jeans in various signature washes.