Filson Waffle Knit Thermal Crew Neck L/S Top Mossy RockWhether youre out in the wilderness or on the job, staying warm and comfortable is a must. Thats Filson created the waffle thermal. This waffle knit shirt traps a layer of air between the fabric and your skin for enhanced breathability and insulation. Made with heavyweight Peruvian cotton, the waffle thermal has a soft feel thats comfortable to wear under a shirt or jacket. The rib knit cuffs complement and stay in place for easy layering so you can