Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Northside Men's Mason Slipper
Product description: Mason is a classic slipper with warm toasty lining and indoor/outdoor outsole, Rock-solid fashions for the family on the go. Whether it's cold-weather boots or rugged sandals, Northside is all about keeping families moving. The products are built to withstand what today's active families throw at them, or on them. Available in the latest styles, materials and colors, these shoes offer flattering silhouettes with great features like quick-draw lacing, toe guards and traction soles. In fact, Northside all-season footwear offers the features of higher-priced brands, without the high price tag. Finally, there's family footwear to get excited about.
Product feature: 100% Synthetic Suede, Imported, Synthetic sole, Shaft measures approximately not_applicable from arch, Synethetic suede or Daybreak Camo upper, Berber lining, TRP indoor/outdoor side stitched outsole, boxed package, Shipping Weight: 5.9 ounces ( View shipping rates and policies ), ASIN: B01BRK99KS, Item model number: MASON-M, Date first listed on Amazon: September 15, 2016, Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues., International Shipping: This item is not eligible for international shipping. Learn More, Average Customer Review: 3.7 out of 5 stars 14 customer reviews
Product price: $19.95
Target attributes: Type
Answer: attribute: type
value: slipper
source: product description
attribute: type
value: slipper
source: product title