SIP HV chainsaw pants. Are you looking for Hi-Vis chainsaw-protective pants without all the bells and whistles—and without stretch? The SIP Protection BasePro collection is exactly what you’re looking for. The outer fabric is made of a standard polyester-cotton blend, perfect for temporary or seasonal forestry work. Make no mistake, though. The BasePro pants—the most economical SIP Protection pants in our lineup—still offer the comfort you want, the protection you need, and the quality you’ve come to expect from SIP Protection.