The tough, feature-packed Brush-Tuff Extreme ATS (Advanced Tracking System) hunting waders provide the ultimate in waterproof protection. Heavyweight 5mm fleece lined neoprene with abrasion-resistant, bidirectional facing protects against punctures. 1600 G. Thinsulate Ultra Insulation in the boot keeps feet warm in the coldest water. An aggressive ATS outsole system provides traction in wet, muddy conditions.