The Master Lock I take to the gym weighs 6 1/2 ounces. I use my backpack to carry my clothes to/from the gym each day.
On day 3 of my recent 5 day backpack I discovered that I had accidentally taken the lock with me on the backpack trip......hidden in the bottom corner of the pack.
So, assuming this will happen again, I'd like to buy a lighter padlock. Any suggestions? I'm thinking aluminum, carbon or cuben fiber or even plastic would be lighter.