Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Dunlop Purofort Thermo+ full safety Green/Brown Shoes E662843 Size - 7
Product description: The Dunlop Thermo+ is the ideal boot for challenging low temperature work environments. The Thermo+ protects workers against cold conditions down to -58F and offers protection thanks to its steel toe cap and midsole. The heat-retaining sole with shock-absorbing technology and the flexible upper offer extra comfort. Additionally, the outsole has a high slip resistance. The Purofort material Technology gives the boot its lightweight and durability. Protection: Steel toecap & midsole, High slip-resistance, Resistant to various chemicals; Comfort: Thermal insulation down to -58F, Excellent shock absorbing.
Product feature: fabric, Size range: US6-US15, Protective toe + midsole, High slip-resistance, Standard: CSA Z195-09 SD PR, ASTM F2413-11 M I/75 C/75 SD PR, Resistance: Minerals, animal and plant oils and fats, fertilizer, acids, disinfectants, solvents, various chemicals
Product price: $21.67
Product brand: Dunlop
Target attributes: Boot Style
Answer: attribute: boot style
value: None
source: None