Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Ringside Undefeated High Top Muay Thai MMA Wrestling Boxing Shoes
Product description: Undefeated in every sense of the word, these sport-specific shoes combine style and substance to produce elite class performance.
Product feature: The Ringside Undefeated Boxing Shoes are undefeated in everything from style to performance in the ring, These sport-specific shoes have a patent leather vinyl finish and a high-top ankle for added support to produce elite class performance, Made with a breathable nylon mesh pattern and a non-slip rubber sole for added comfort and safety while fighting, Please see conversion size chart to help determine sizing - Shoes are adult male US sizes - (Ex: Women size 7 = Men size 5), These boxing, Muay Thai, MMA, wrestling shoes are sure to provide comfort and support during competitions
Product price: $47.15 - $95.90
Product brand: RINGSIDE
Target attributes: Heel Height
Answer: attribute: heel height
value: None
source: None