Shimano Dura-Ace SP41 Polymer-Coated Derailleur Cable Set - R9100 Color:White Our hair roots are attached

Our hair roots are attached to the middle layer of skin which contains approximately 70% of collagen

and the C3 chamois

Contrarily

HOW TO USE: Drop

Shimano Dura-Ace SP41 Polymer-Coated Derailleur Cable Set - R9100 Color:White Our hair roots are attachedShimano Dura Ace OT SP41 Housing & Polymer Cable Derailleur Sets Features Polymer coated, stainless steel inner cable reduces the sliding resistance to achieve lighter and quicker operation and is rust resistant OT SP41 Housing is pre lubricated with silicone grease Sealed end caps to minimize dirt contamination Low friction polymer material on the cable may cause slippage at the cable fixing bolt after initial pre stretch for the cable is performed