Internal circulation of heat; heat storage against cold keeps warmer. Resist the severe cold, this winter is no longer cold. Constant temperature system, long-lasting temperature lock. Good windproof slacks, with division of labor inside and outside for wind and cold resistance. The outer layer is windproof to keep out the cold, while the inner layer of fleece fleece locks in heat and traps warmth. The outer layer protects against the cold; the inner layer protects against the wind and cold. The inner layer locks in heat; the inner fleece fibers retain heat and trap it. Waterproof Double warm Three times the warmth in one pant. Bionic lotus leaf water gathering technology Not afraid of rainstorms. Double waterproof technology, watertight. The thickness is upgraded, and one piece is worth 3 pieces. Product detail presentation Waistband: Stretch for comfort; easy to adjust. Pocket design: convenient storage; safe and anti-lost. Foot opening: Locks in warmth for freedom of movement.