A close second ...
... in the Steve Cockerill hall of great products (#1 would have to be the aquafleece). It does precisely what is wanted for a loose-footed mainsail clew strap. Be sure to measure first to buy the one that fits your boom.
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65mm Clew Strap - made from super slippery dynema webbing. This is not just a strap - it is also a method for tightening the strap to make sure the sail is as close to the boom as possible - thus avoiding your head.
Suitable for many boats including the D Zero.
... in the Steve Cockerill hall of great products (#1 would have to be the aquafleece). It does precisely what is wanted for a loose-footed mainsail clew strap. Be sure to measure first to buy the one that fits your boom.
Perfect