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: adidas Men's Techfit Powerweb Sleeveless Tee
Product description: High compression provides strong support for the body, reduces muscle vibration and improves body posture. TECHFIT PowerWEB positively influences posture and explosivity when executing sports activities. CLIMACOOL provides heat and moisture management through ventilation. TPU powerbands for elastic support and performance enhancement of key muscle groups. Flatlock seaming for improved comfort. FORMOTION technology for freedom of movement. NCAA/NFHS compliant.
Product feature: 75% polyamide / 25% Spandex Tricot, Imported, 75% polyamide | 25% spandex tricot., FORMOTION, powerWEB, Machine wash, China
Product brand: adidas
Target attributes: Sleeve Style
Answer: attribute: sleeve style
value: sleeveless
source: product title