JustBatReviews Puts the Varo RAP Hittable Bat Sleeve to the Test 

Aside from protecting the barrel this is useful b/c it adds 4 oz of balanced weight to the bat and still allows the player to hit with the bat. So, it's a training tool as well. Take BP with your own bat and the extra weight. Swing in the game with a bat 4 oz lighter with increase bat speed (over time)

You can hear it absorbs

The weight is throughout the sleeve. Not in the cap!

So you want to protect it for what? This is that kid on my team who always shows up with a gucci ball bag and just sits out in right feild doing nothing but playing with dragon flys

Why would you want to protect a metal bat?

Seems dull