LOOP Soft Shackles Are made from Gottfreidi Maffioli Compact Braid ( SK78 Dyneema), and are an ideal lightweight, strong rope shackle that won't cause the damage to your boat that a metal shackle might. Loop shackles are very easy to open by hand and are available in both single and double string constructions.  See also the LOOP COVER SHACKLES made from Dyneema chafe cover