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Double-Wall Bat
Also known as: multi-wall bat
A double-wall bat has two layers of barrel material that flex together at contact, adding "trampoline" effect for more exit velocity than a single-wall bat.
Multi-wall construction increases the barrel’s elastic rebound (raising its BPF) so the ball springs off faster. Because that performance can exceed safe limits, associations cap barrel performance by BPF and may certify or ban specific models. The trade-off is a smaller effective sweet-spot feel and a higher price.
Example
A hitter switches from a single-wall to a certified double-wall bat and gains several mph of exit velocity on squared-up balls.
Related terms
- BPF (Bat Performance Factor)BPF measures how much energy a bat returns to the ball compared with a completely rigid wall. A higher BPF means more "trampoline" pop off the barrel.
- End LoadEnd load is extra weight added toward the barrel end of a bat to increase swing momentum and exit velocity. End-loaded bats reward hitters who can control them with bat speed.
- Compression RatingCompression rating measures how much force it takes to compress a softball a quarter inch, in pounds per square inch. A higher rating means a harder ball with more pop.
Related guides & benchmarks
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