SIP CHAINSAW TROUSERS Class 2The PRO Gression are just like the 1SQT class 2 Progress chainsaw trousers. They now come in a fashionable new design and have a new, even more comfortable, and stylish fit and have a more flexible reinforcement at the knees. On top of that, a new six layered blocking material is used for its class 2 protection. As its one of the Progress ranges key features, the extremely robust 4 way stretch TeXXion outer fabric is used.