SOS pads
Sintered doesn’t perform as well as Organic in the cold, and by its very nature (more than 60% metal) it generates and conducts a great deal of heat to the brake fluid. 

SOS:
• 3 x less heat generation than Sintered Pads
• Offers cold performance of Organic Pads
• Quiet operation 
• High temp performance of Sintered Pads
• Wear characteristics of Sintered
Shimano Deore ; Naxave BR-M555 hydraulic