This silicone roll on is an ideal protection agains sports runs. It works on;
Shoes (especially if you don't wear socks)
Swim Suit rub (women suit rub on the shoulder)
and it's kind to your garments too.
Being made of silicone it's safe on neoprene and plastic, with none of the hard effects of vaseline. It also remains effective until it is washed off with soap - unlike stick based lubricants, which wear off on longer swims and efforts.