Boston Red Sox #28 J.D. Martinez Majestic Alternate Official Cool Base

Authentic-Style Baseball Jersey – Printed On Demand

Step on the field in style. This MLB-inspired jersey is built from moisture-wicking polyester mesh with reinforced stitching – the same construction players trust, ready to ship today.

📸 Image is a preview – this jersey is available in 4 variants: Men’s Cool Base (Replica), Men’s Flex Base (Authentic), Women’s, and Youth (Boys). Select your style and size at checkout.

The Good Stuff

🎨 Graphics That Last – Heat-sealed or screen-printed for crisp, fade-resistant color wash after wash.
🧵 Soft Athletic Mesh – Smooth-hand polyester with moisture control. Feels broken-in from day one.
👕 True-to-Sport Sizing – Jerseys are built loose for layering. Between sizes? Size up for that classic ballpark fit.
⚾ Cheer or Play – Worn on the field or in the stands, this jersey delivers the same premium feel.

What It’s Made Of

Men’s Cool Base (Replica): 100% polyester mesh, ~220g – classic loose replica fit, tolerance ±1.5 in.
Flex Base (Authentic): 88/12 polyester/spandex at ~240g. Athletic stretch fit, moisture-locked performance feel.
Women’s Fit: 100% polyester mesh, ≈200g, tailored female cut. Youth (Boys): 100% polyester mesh, ≈180g, sizes S–XL (ages 6–20).
Jersey fit – all measurements in inches. Between sizes? Size up for the classic loose look.

Find Your Perfect Fit

Compare your measurements to the charts below. Remember – jerseys are built roomy, so size up if you’re on the fence.

Size Guide — Baseball. All measurements in inches. If between sizes, size up for the classic looser jersey fit.

Men · Cool Base (Replica · ±1.5 in)

Size	Chest (in)	Waist (in)	Length (in)
S	41–43	40–42	28–29
M	44–45	43–44	29.5–30
L	46–47	45–46	30.5–31
XL	48–49	47–48	31.5–32
2XL	50–53	49–52	32.5–33
3XL	54–56	53–55	33.5–34
4XL	58–60	56–58	34.5–35

Men · Flex Base (Authentic · ±1.5 in)

Size	Chest (in)	Waist (in)	Length (in)
S	40–42	39–41	29–30
M	43–44	42–43	30.5–31
L	45–46	44–45	31.5–32
XL	47–49	46–47	32.5–33
2XL	50–53	48–51	33.5–34
3XL	53–55	52–53	34.5–35
4XL	57–59	54–56	35.5–36

Women (±1.2 in)

Size	Chest (in)	Waist (in)	Length (in)
S	34–35	26–27	22–23.5
M	36–37	28–29	23.5–24.5
L	38–40	30–32	24.5–25.5
XL	41.5–42.5	33.5–35.5	25.5–26.5
2XL	43–45	36–38	26.5–27.5

Youth (Boys) (±1.2 in)

Size	Age	Chest (in)	Length (in)
S	6–8	32–33	22–23
M	10–12	34–35	24–25
L	14–16	36–37	26–27
XL	18–20	38–40	28–29

How to measure: Chest — across fullest part relaxed · Waist — ~1 inch above navel · Length — shoulder seam to hem.

Shipping & Delivery

✅ In Stock — Ships: within 1–2 business days.
📦 US Delivery: 3–7 business days.
⚡ US Express Option: 2–4 business days.
🌍 Rest of World: 1–3 weeks.
⚠️ Popular designs: Occasionally restocking takes 1–2 extra days of production before we can ship.

Our jerseys are stocked and inspected, ready for fast shipping. Occasionally a high-demand design needs a short 1–2 day production catch-up before it ships. Please measure carefully and match to the correct variant chart above. Questions? We reply fast.

⚾ Explore the collection at WearSparks.com. Every jersey, ready to ship.

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Boston Red Sox #28 J.D. Martinez Majestic Alternate Official Cool Base Replica Player Jersey - Scarlet