Super-Polytex / MacroLiteAIRSTRIPES SYSTEM - Unique back ventilation that allows your pack to sit secure and snug against your back while circulating fresh air through with highly breathable foam.VERSATILE - Large enough to carry both your work and school equipment plus gym gear.STORAGE - Stretch pockets on the side in the front provide additional storage space. Internal compartment perfect for storing documents.SPECS - 18.1” x 11.8” x 7.5” (46 x 30 x 19 cm) | 1.7lbs (790g) | Multipurpose material with high abrasion resistance bottom | PFC free coating