I am selling this backpack because I bought it last fall and have never had a chance to use it. Durable nylon, black backpack with a simple design. - Brand: GREGORY - Color: Black - Design: Simple backpack - Features: Adjustable straps - Material: Durable nylon - Size: Medium Thank you for looking. GREGORY DAY PACK Backpack, Rucksack, Backpack, Men's, Women's, A4, 26L, 65169 Type: Rucksack Main Storage: Mesh zipper pocket x 1 (with key hook), Open pocket x 1 External Storage: Zipper pocket x 1 Functions Main opening using sturdy YKK zipper #10 Angled zippered front pocket Bottom reinforced with lining Height-adjustable chest strap 8-ring attachment for single pocket (sold separately) Straps for ice axes/trekking poles Size (Official) Height x Width x Thickness: Approximately 45.5 x 40 x 16.5 cm Capacity: Approximately 26L Weight: 645g Material HD Nylon, Combat Foliage, Combat Navy: Ballistic Nylon, Others: Nylon