Patagonia Nano Air® Light Jacket Men's Breathable Stretch Insulated Jacket Size:MD and IGUS bushings ensure long lasting Rope and IGUS bushings ensure long lasting Aluminum body machined for optimal weight Cast stainless wings and sleeve with steel spindle add strength and stability without a weight penalty Low profile design and platform deliver a more powerful and efficient pedal stroke 6 of knee saving float with a choice of a 15 or 20 release angle gives you a customized fit for all terrain 10mm needle bearing inner and cartridge bearing outer Brass cleat and mounting hardware included Aluminum end caps It's filled with lightweight FullRange® synthetic insulation that's exceptionally air permeable and stretchy A DWR (durable water repellent) finish sheds light moisture while the mechanical stretch shell and lining keep it comfortable on the move