In the KUIU Layering System, waterproof rain gear is classified as outer-layer waterproof rain gear. It is worn over a base layer, mid-layer fleece, and mid-layer insulation, and is sized slightly larger than insulated mid layers and outer-layer soft shells so you can layer all pieces in the same measured size without upsizing.

KUIU describes its waterproof rain gear as using 3- and 4-layer polyester and nylon constructions with breathable waterproof membranes. Key features highlighted include seam-taped joints, durable 3- and 4-layer laminated fabric, and breathable waterproof membranes for protection in heavy wind and rain.

The waterproof jackets collection includes uninsulated options such as the HD Flex Storm Shell Jacket, Yukon TR Rain Jacket, Kutana Storm Shell Jacket, Chugach TR Rain Jacket, Women's Chugach TR Rain Jacket, and Northridge Rain Jacket. In waterproof insulated options, choose from the Super Down Burner Parka, Paragon Storm Shell Parka, Kutana Gale Force Hooded Jacket. These styles range from lightweight and packable rain jackets built for incidental use to waterproof parkas for freezing and wet conditions.

KUIU offers a Jacket Comparison Guide that allows hunters to compare jacket types, including waterproof rain gear, by features, conditions, and layering position. The Layering System page also provides examples showing when to add Chugach TR, Yukon TR, or Kutana Storm Shell rain gear in place of soft shell outer layers when 100% waterproof protection is needed.

KUIU's layering guidance explains that soft shell jackets are outer layers for light wind and rain, while waterproof rain gear is worn over base layers, fleece mid layers, and insulated mid layers when heavy wind and rain are expected. In cold conditions, KUIU notes that if 100% waterproof protection is needed, Yukon TR or KUIU Kutana Storm Shell rain gear can be worn in place of soft shell outer layers like Axis Hybrid, and in frigid conditions Super Down Burner Parka is a top choice.