Asics Novablast 4 Light Sapphire Sapphire Size:11.5 Weight with flask: 10oz 283g Weight with flask: 10oz 283g Grippy outsole provides reliable traction on varied surfaces Trampoline inspired outsole design Helps provide a more responsive bounce back At least 75% of the shoe’s main upper material is made with recycled materials to reduce waste and carbon emissions The sockliner is produced with the solution dyeing process that reduces water usage by approximately 33% and carbon emissions by approximately 45% compared to the conventional dyeing technology Reflective details Help improve visibility in low light settings