Prolar is Elvex brand name for our exclusive chainsaw protective pad. Prolar is not a static product, but is going through continuous development, in order to improve the compromise between performance and comfort. The unique explosive action of Prolar works by jamming the chain against the bar and sprocket. Prolar combines light weight and flexibility for superior user acceptance while providing highly effective protection. Elvex Prolar pads have been tested by Underwriter's Laboratories (UL) for conformance to ASTM F-1897-98. This test establishes a pass or fail in regards to the 2,500 feet per minute requirement. Separate testing has established a performance threshold of approximately 3,000 feet per minute. This indicates that Prolar in its current state of development provides a substantial safety margin, as compared to the requirements of the ASTM standard. 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 chainsaw chaps meet the requirements of ASTM Standard for Leg Protection for Chain Saw Users (F-1897-98). 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. Key Features Elvex ProChaps are available in the following lengths, 28", 33". 36" and 39". The length is measured from the belt to the bottom of the chap. Elvex ProChaps use Prolar™ lightweight protective pads described above.. Elvex 90 series chainsaw chaps use a 420 denier Nylon cover material, and have two sets of quick connect leg buckles. Elvex 94 series chaps use 1,000 denier (Cordura) Nylon cover material, and have three sets of quick connect leg straps and buckles. Elvex 91 series chaps add wrap around protection around the calves. All Elvex ProChaps are equipped with a front zippered pocket Elvex 90 Series ProChaps Chainsaw Chaps Regular price: $71.95 Sale price: $63.95 Elvex 91 Series ProChaps ChainSaw Chaps $79.95 Elvex 94 Series ProChaps Chainsaw Chaps $84.95 Elvex ArborChaps - One Size Fits All $56.75 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.