String-reinforced 20' x 100' clear poly sheeting adds internal strength where standard film can't keep up. This scrim-reinforced plastic features an internal grid that dramatically improves tear resistance, making it ideal for crawl space vapor barriers, underfloor moisture protection, and rugged dust and debris containment. The 20-foot width is easy to work with in tight spaces like low crawl areas and narrow rooms.Need something that won't shred the first time someone crawls across it? This reinforced film is designed for foot traffic, tool contact, and repeated access, performing far better than ordinary sheeting of similar thickness. Use it for longer-term covers, durable crawl space liners, and enclosures where bumping, snagging, or flexing is expected. Clear visibility keeps the workspace bright and makes inspection and monitoring simpler. For pros who are tired of flimsy film failing mid-project, this is a serious step up in strength.