On the Cap, it is a reinforced section of the tramp and a SS eyestrap with a pair of wide washers. The tramp does "tent" up when you're sheeting, as well as some bowing in the boom. At first, I couldn't take my eyes off of it, thinking it looked imminently catastrophic. It wasn't, though, and I eventually was able to tear my eyes away and focus on puffs again. It did not feel spongy and I found myself sheeting the main harder than I ever did before. It was pretty cool. Can't wait to hand it off to my crew (evil laugh...).