SAN FRANCISCO – Outdoor adventure apparel brand Royal Robbins expands its best-selling Desert Pucker collection for Spring 2025. …Since the first Pucker shirt, Royal Robbins has worked with longtime fiber partner, Tencel Modal, to create an exceptionally soft, breathable and ultra-comfortable fabric. It all starts with responsibly sourced wood-based Tencel Modal fibers and a process that produces 50 percent less carbon emissions and water consumption than generic modal fibers. …The wood used as raw material for all Tencel Modal fibers is sourced from controlled or certified origins meeting the Forest Stewardship Council (FSC) or Programme for the Endorsement of Forest Certification (PEFC) standards. …The Desert Pucker helps the brand meet its highest sustainability standard yet, with 83% of styles made from materials that contain 50% or more lower-impact fibers, preferred cotton, recycled polyester, preferred forest materials, hemp, or recycled nylon.