Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Kelty Redtail 27 Backpack
Product description: Light and compact with a simplified design, the Red tail is made for day hikes. Panel loading convenience makes it easy to pack extra apparel and snacks while a large front pocket with organization and a small, zipper stash pocket are there for smaller items, keeping them close at hand. The hydration compatible design and two water bottle pockets gives you options on how to stay hydrated, which is key to any successful outing. The dynamic Airflow Panel and Air Mesh shoulder straps, waist belt, and lumbar pad will keep you cool and comfortable all day. . Body Fabric: 420D Polyester Ball Shadow. Reinforcement Fabric: 450D Polyester Oxford. Suspension: Fixed .
Product feature: Polyester, Imported, Five interior slip pockets. Four exterior pockets.
Product brand: Kelty
Target attributes: Material
Answer: attribute: material
value: None
source: None