Packed with comfort features including Timberland's own SensorFlex technology, this Port Union waterproof style features clean silhouettes, warm insulation, and eco-conscious materials. Features OrthoLite Insoles OrthoLite comfort foam insoles provide moisture transport, antimicrobial function and long-term cushioning. The ultra-breathable material won't break down or lose cushioning over time, keeping your footwear comfortable and supportive. Waterproof Footwear Waterproof footwear incorporates a variety of advanced waterproofing materials, treatments and processes. Timberland started with waterproof leathers that are sealed as part of the tanning process; then they either seam-seal the footwear or use an internal waterproof breathable membrane to help feet stay dry. Better Leather Sourced from a tannery rated Gold or Silver for environmental responsibility by the Leather Working Group, a multi-stakeholder auditing group. Timberdry Waterproof Technology A waterproof membrane or linings made with 50% PET (recycled plastic bottles). SensorFlex Comfort System With a triple-layer suspension system that flexes with every step, SensorFlex comfort system instantly adapts to uneven terrain to provide a smooth, stable ride. 50% Recycled PET One or more major components contain at least 50% recycled polyethylene therephthalate (PET), the plastic used to make soda bottles. PrimaLoft insulation PrimaLoft insulation is a soft, lightweight compressible down alternative insulation. It uses a patented microfiber structure to help retain warmth, even if the fibers get wet - so you remain dry, warm and comfortable.