Climb X 12 In X 12mm Dyneema. Climb X Slings come in a variety of sizes to fit your pro requirements. Precision computerized bar tacking, Dyneema material, and meticulous quality control, earns Climb X CE Certification to ensure maximum security. Reduce rope drag and keep cams from walking with our 12 Dyneema Slings. At this price, you can ensure that all of your slings have maximum integrity.