Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Gbag (T) 15" leather messenger flap over leather messenger shoulder laptop bag for men and women
Product description: Leather Messenger Bag for Men Leather Laptop Bag Shoulder Bag Cross Body Bag Key Features: Ideal for 15-inch or smaller Laptop / Macbook Full flap cover that fastens down via magnetic buttons Can also additionally store files, books, mobile , tablet, laptop charger, etc. 3 Internal compartments: Inner walls are cushioned for keeping laptop/macbook/iPad etc. 2 additional Zippered pockets on the internal walls of the bag 1 Adjustable Strap with Max Length 55 Inches A Fair Trade Product made from Goat Hide Allergy Free, No lasting Awful Smell, Dyed using natural ingredients, Safe for Your Skin & Nature Additional Details: Pure leather, by nature, has some scars (due to markings/cuts on goat skin) which reconfirms that the leather is 100% genuine. Due to this unique characteristic, each of our leather products is one of a kind, which adds character to your prized possession. Each leather product has a distinctive color tone, which may be different from shown images. The new leather product may have a distinctive leather smell. It will fade away within 3-4 weeks of regular use.
Product feature: Imported, A must have classic retro style laptop/college messenger bag. This bag comes with two inner compartments and two inner zipper pockets each on the inside. This bag has enough room for your books, laptop, files and other essentials. Leave an impression on your colleagues and your friends by this classic unisex bag., Dimensions: 15"(W) x 11"(H) x 4"(D), A full flap fold over with 2 magnetic snaps to hold it shut, This is perfect to use as a: messenger bag for men leather, messenger bag for women leather, messenger bag leather, leather golf bag, laptop bag leather, leather bags, leather camera bag, leather crossbody bag, leather computer bag, business leather bag, messenger bags leather, leather laptop bag for men
Product price: $17.90
Product brand: Gbag (T)
Target attributes: Material
Answer: attribute: material
value: leather
source: product description
attribute: material
value: leather
source: product title
attribute: material
value: leather
source: product feature