its my first time here , im in puerto rico and my inglish is not to good but will trie. my hooby is motorcycle seat ,i made a seat for a honda the base in f.glass espesial foam the top in 6onz the side in 3onz paint in black .really tide . i let the seats in my car over night and wen i loock this morning it has a lot of slac like the leather grow.any explannation