Baseball Jersey Fabric Guide: Interlock, Mesh and Double-Knit Explained

Updated 2026-10-17

What baseball jerseys are made of, how 140, 160 and 220 gsm fabrics feel and perform, and which fabric suits youth, travel, high school and adult teams in California heat.

Why the fabric matters more than the design

Every custom jersey website shows you colors and logos first. The fabric decides whether the jersey is still worn in August. It sets the weight on a player's shoulders, how fast sweat leaves the body, how the print looks up close, and whether the collar is still square after thirty washes. Spend five minutes here before you spend an hour on the design.

The three fabrics used for team jerseys

Interlock is a two-faced knit: the same smooth surface on both sides. It is what most people picture when they think of a sublimated jersey. Mesh fabrics are knitted with deliberate holes; micro-mesh holes are small enough that the fabric looks solid from a few feet away. Double-knit is interlock's heavier cousin, used for pants because it resists abrasion from sliding.

Reading a gsm number

Gsm is grams per square meter, the weight of the fabric. A 160 gsm jersey in adult large weighs about 180 g all in. Drop to 140 gsm and you save roughly 25 g, which does not sound like much until the third game of a Saturday. Go up to 220 gsm and you have a pant that will not show a slide mark.

The number also hints at opacity. White interlock below 150 gsm starts to show a dark undershirt through the body; that is why our white jerseys stay at 160 gsm while colored jerseys can go lighter.

Heat: the California question

Fresno, Bakersfield, Riverside and the desert tournaments in Arizona push jerseys past 95°F for weeks. In those conditions micro-mesh is the right game fabric. It dries in a few minutes between innings and weighs the least. Coastal programs in San Diego, Long Beach and the Bay Area generally stay with 160 gsm interlock, which feels more like a traditional uniform and keeps its shape in wind and fog.

A sleeveless vest in interlock over a fitted undershirt is a third option that many travel programs use: the vest is light, the undershirt sleeves can change color between games, and pitchers stay inside league rules about sleeve color.

How fabric changes the print

Sublimation bonds ink into polyester fiber, so the smoother the surface, the sharper the result. Interlock reproduces 1 mm lines and small sponsor text cleanly. Micro-mesh is nearly as sharp. Open mesh softens fine lines because the holes break them up, which is why we thicken outlines on names and numbers for open-mesh orders and show the difference on the proof.

• Interlock: finest detail, best for complex logos and pinstripes
• Micro-mesh: sharp enough for any team design, tiny text may soften
• Open mesh: use bold shapes and thick outlines

Durability and washing

All three jersey fabrics are 100% polyester, so they do not shrink and the color is inside the fiber. The difference is snagging: open mesh catches on Velcro and chain-link; interlock and micro-mesh do not. Wash cold, inside out, and skip the dryer or use low heat. The collar and cuffs are the first things to go on a cheap jersey; ours use a self-fabric binding rather than a thin rib so they stay square.

A quick decision table

Pick the fabric, then pick the cut. Our custom baseball jerseys page lets you combine any fabric with any collar, and the proof will say which fabric it was rendered on.

1. Decide where and when the team plays most.
2. Pick interlock for spring and coastal games, micro-mesh for heat.
3. Choose open mesh only for practice tops.
4. Ask for a fabric note on the proof before you approve.