Crossfit is a great way to work your body, but it has a super unexpected consequence - it may make your hands blister and rip. If that sounds unappealing to you, you can try to keep your hands moisturized as much as possible.
Ripping comes from calluses, and calluses come from working your hands hard. The area becomes hard and dry, making your skin more brittle, making it rip. Make sure your hands are moisturized throughout the day (though it's not recommended you lather up right before your workout) to mitigate the chance of calluses. Keeping your hands moisturized also leaves them more supple and elastic, further reducing the chances of your hands ripping.