Removable SMARTY® 3-in-1 Stretch Poly Fleece Pant Liner Black Size Large Fleece only, no cargo shell - SMARTY® Compatible - INFIDRY - Belt Loop Stash Pocket - Core Ultra Thread Exclusive to 686 infiDRY® fabric fuses our signature fabrics with waterproof and breathable elemental protection. SMARTY® 3-in-1 Technology is the original, trademarked 3-in-1 detachable layering system that adds versatility and value to outerwear. What started as an idea that 686 founder Michael Akira West thought sounded “smart”—attaching an extra inner layer for warmth that could double as its own outfit—has become so ubiquitously used to describe layering it’s practically its own brand name. Since its inception decades ago, 686 SMARTY® 3-in-1 technology has set the integrated layering standard for the outerwear industry, adding premium versatility and value to jackets and pants. Every SMARTY® combination is specifically designed so that the shell and detachable liner work in unison to provide the ultimate experience, versatility, and value. 686 is committed to a continuous journey of improvement and positive contribution to the world we live and play in, and using our business as a force for good. B Corp Certification designates that we’ve met B Corp community standards of performance, accountability, and transparency on factors from employee benefits and environmental management to supply chain practices and input materials.