The Gregory Terros brings mountain-proven construction to everyday carry. Exterior fabrics are 100% recycled - a 500D x 600D recycled polyester body over a rugged 900D recycled base, both finished with a PFAS-free DWR. A breathable backpanel and supportive harness keep it comfortable whether you are crossing campus or logging trail miles. Available in 20L, 25L, and 28L.Features: 100% Recycled Exterior - 500D x 600D recycled polyester body with a 900D recycled base PFAS-Free DWR - Water-repellent finish without PFAS chemistry Breathable Backpanel - Ventilated support for all-day comfort Supportive Harness - Carries a load comfortably on trail or in town Size-Specific Organization - 20L and 28L add a front bungee system; 25L adds a front zippered pocket with interior mesh Load Control - Side compression straps on the 25L and 28L stabilize the load