5-layer and 3-layer GORE-TEX® Immersion® Technology Patented YKK® Aquaseal® waterproof center-front zipper Adjustable stretch spacer mesh suspender system Zippered hand warmer pockets with quick-drying micro fleece lining Patented front and back leg seam 4mm high-density neoprene stockingfoot with hourglass seam design for more cushion & increased durability> Simms