Pickleball paddles are changing from the inside. Polypropylene honeycomb remains an excellent, proven core, but designers are now using EPP, EVA, MPP and mixed foam architectures to tune rebound, damping, stability and weight distribution. That creates useful new options—and a lot of confusing labels.
What a paddle core actually does
The face gets attention, but the core helps shape how a paddle responds at impact. It can influence rebound, pop, vibration, off-centre stability, dwell sensation and where weight sits in the paddle. It does not act alone: face layup, thickness, shape, edge construction, foam density and stiffness all interact.
Traditional PP honeycomb
Many paddles use a simple architecture: carbon face, polypropylene (PP) honeycomb, carbon face. The hollow cells support the face without filling the paddle with solid material. That makes honeycomb a lightweight, efficient and familiar platform. A honeycomb paddle can still be soft, firm, controlled or powerful depending on the rest of its construction.
Perimeter foam is not full foam
A PP honeycomb centre with foam around the edge is still primarily a honeycomb-core paddle. Perimeter foam can reinforce the edge, change balance and make off-centre contact feel steadier. A full-foam paddle is different: engineered foam becomes the main core structure. Hybrid designs may use, for example, an EPP centre with EVA around it.
EPP: expanded polypropylene
EPP is a lightweight cellular polypropylene foam. It can be formulated to recover after compression, so it gives designers a way to pursue responsive rebound while controlling core mass. That does not make every EPP paddle a power paddle. Density, hardness, face construction and geometry can make one EPP design feel plush and another direct or poppy.
EVA: ethylene-vinyl acetate
EVA is often used where cushioning and damping are useful. In a paddle it may be a main-core ingredient or a strategically placed perimeter material. A common hybrid idea is an EPP centre for resilience with an EVA perimeter for support and a different impact feel. EVA is not automatically soft; its formulation matters.
MPP and hybrid foam language
MPP is commonly used to describe microcellular polypropylene foam. The terminology is not standardised across every manufacturer, so an “MPP core” label alone cannot tell you density, hardness, cell geometry or where the material sits. A hybrid core simply combines materials or zones: PP plus perimeter foam, EPP plus EVA, or multiple foam densities.
Density is not hardness
Foam density is normally expressed in kg/m³ or g/L; 1 g/L equals 1 kg/m³. It describes mass per volume. Hardness describes resistance to deformation under a particular test. Two foams can share a density but feel very different. The most useful specification would state material, density, hardness, geometry and position—not just “premium foam core”.
Does foam automatically mean more power?
No. A construction can return impact energy efficiently, dissipate more of it through damping, or feel fast on compact counters without being the most powerful on a full swing. The useful question is not “is it foam?” but what foam is used, where is it used and how is the entire paddle engineered?
For tournament play, check the exact model on the USA Pickleball Approved Paddle List; material alone never grants approval.