Harley Davidson Men’s M Manitowoc Stretch Front/Back Vents Riding Jacket. The Manitowoc Stretch Riding Jacket is all about comfort and mobility. Construction includes soft shell body, stretch sleeve panels, and power-stretch action back and waist. To help keep you cool, look for front and back vents. For more about this men’s textile motorcycle jacket, read all the listed features.. Two front vents and two back vents. Power-stretch action back and waist. Pre-curved sleeves and snap sleeve tabs. Body armor pockets at elbows, shoulders, and back. Lightly padded back waist. One interior stash pocket and one interior zipper pocket with media port. Rubber patch and debossed graphics. 88% nylon, 12% spandex soft shell body and sleeves with stretch sleeve panels. Polyester/spandex mesh knit lining. H-D MotorClothes and accessories f rom the now retired Thunder Road Harley Davidson Dealership showroom located in Sharon PA. Please see garment diagram in photos for measurements. It is advisable to flat measure a properly fitting, similar garment that you have for comparison.