Prolar is the Elvex brand name for their exclusive chain saw protective pad. Prolar is not a static product, but is going through continuous development, in order to improve the compromise between comfort and performance. The Prolar protective pads combine a unique fibre composition with special weaving to create one of the most effective chain saw protective pads on the market. The unique explosive action of Prolar works by jamming the chain against the bar and the sprocket. Prolar combines light weight and flexibility for superior user acceptance with highly effective protection. Elvex best selling chap model has sold in hundreds of thousands. A long list of unique standard features explain teh popularity of this design: Patented asymmetrical design provides extended protection on the left side of each leg, where most injuries occur. - Lightweight, flexible and strong 420 denier Nylon cover fabric. - Easy on, easy off apron-style design. - Quick Release buckles for waist and legs. - A zippered front pocket is a standard feature not found on other brands. Elvex chain saw chaps meet the requirements of ASTM Standard for Leg Protection for Chain Saw Users (F-1970-98). This standard requires that the chaps can stop a chain saw running at 2,500 feet/minute under controlled laboratory conditions. (There are no longer two classes of chaps as previously required by the American Pulpwood Association Standard, APA 92-A-12.) The performance requirements remain unchanged at 2500 feet per minute chain speed, tested at both 45 degrees and 90 degrees to the longitudinal axis of the test sample. Compliance tests are performed by Underwriters Laboratories (UL) in accordance with ASTM F-1414, Measurement of Cut Resistance to Chain Saw Lower Body Protective Clothing. Available in bright orange fabric in 28, 33 and 36 inch lengths. See below for 39" length. Measure from waist to bottom to determine your size. Elvex 90 Series ProChaps Chainsaw Chaps prochapsRegular price: $71.95Sale price: $63.95Size: JE-9028 28-Inch LengthJE-9033 33-Inch LengthJE-9036 36-Inch Length 39" Length 90 Series Elvex ProChapsSame features as above - 39" from waist to bottom. JE-9039$76.95 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.