This 30L Mountaintop hiking daypack is made of lightweight anti tear water repellent 500D polyester with reinforced lap knots for durability. It features multi compartment storage with a hydration bladder sleeve, ergonomic support straps and compression systems, plus functional fixing straps for outdoor gear. Weighing 1.8 pounds, it fits most airline sizes and suits hiking, camping, fishing and daily use for both men and women.