Description of Gregory z65 Backpack Say hello to your new best friend. The Z65 boasts a newly designed, beefed up waistbelt that effectively transfers the load off of your back and onto your hips for maximum comfort on the trail. Features: JetStream™ LTS Suspension with thicker, more supportive foams and waistbelt Auto-Fit harness system Dual hydration ports and sleeve All access front zip Floating top lid Side and bottom compression Quick access waistbelt pockets Exterior side pockets Dual axe/tool attachment points Welded, water-resistant zippers 210d HT double box ripstop and broken twill nylon fabrics S 3600IN³ / 59L 3LBS 9.5OZ / 1.63KG 16-18 INCHES M 3966IN³ / 65L 3LBS 14OZ / 1.76KG 18-20 INCHES L 4332IN³ / 71L 4LBS 3OZ / 1.90KG 20-22 INCHES Flint Gray