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USA & Canada: 7–12 business days
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Europe: 5–12 business days
Asia Pacific: 10–20 business days
Australia: 8–15 business days
Typical delivery times are 3–12 business days, depending on the destination. Please note that actual delivery times may vary due to customs, carrier delays, or peak shipping periods.
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For quality-related issues or shipping mistakes on our side, we’ll cover the return shipping cost. Approved refunds are issued to your original payment method within 1–3 business days after inspection.
This MT99 long sleeve shirt combines a light grey waffle-knit body with bold grey camouflage raglan sleeves for a distinctly American streetwear aesthetic. The chest graphic reads "MT99 Growing In The World" in a mixed leopard-print and script lettering style, adding a retro subcultural edge to an otherwise clean silhouette. Designed for men and women, it works equally well as a standalone layer or a base piece under an open jacket.
Product Highlights
Contrast design: light grey waffle-knit body paired with grey camo-print raglan sleeves
Chest graphic: "MT99 Growing In The World" in decorative leopard-fill block letters and cursive script with orange star accents
Crew neckline with a clean ribbed collar for a classic, comfortable fit
Raglan sleeve construction reduces shoulder seam bulk and allows easy layering
Relaxed, slightly oversized silhouette suits a range of body types
Unisex styling — suitable for both men and women
Fit & Styling
The shirt runs with a relaxed, slightly boxy fit. Based on the size chart, size M measures 67 cm in length, 114 cm chest, 51 cm shoulder width, and 54 cm sleeve length. Size L adds approximately 1 cm to each dimension, and XL adds another centimetre. If you prefer a closer fit, consider sizing down one size. Style it with straight-leg jeans or cargo pants and chunky sneakers for a complete American streetwear look. The neutral grey-on-grey camo palette keeps it versatile and easy to coordinate.
Product Details
The body is constructed from a textured waffle-knit fabric, typical of 60% Cotton, 40% Polyester blends used in this style of casual long sleeve top. The sleeves use a printed camo jersey fabric. Available in sizes M, L, and XL. Measurements are taken flat; a tolerance of 1–3 cm is normal for hand measurement. Brand label: MT99 / Mo99.
Size Guide
Use the measurements below as a guide and compare them with a similar item you own.
Size
Length (cm)
Chest (cm)
Shoulder (cm)
Sleeve (cm)
M
67
114
51
54
L
68
118
53
55
XL
69
122
55
56
How to Find Your Perfect Size — Every Time
How to Find Your Perfect Size — Every Time
Struggling to pick a size online? Here's a simple trick: instead of guessing, use a piece of clothing you already own — and love the fit of — as your reference point.
Step 1: Pick Your Reference Item Think of a T-shirt you've bought before that fit you perfectly. Find that order and pull up its size chart.
Step 2: Focus on Two Key Measurements For streetwear-style tees, two numbers matter most:
Chest width— too narrow and it'll feel tight
Length— too long and it'll look sloppy
💡 Tip:Size charts sometimes list "Chest" as theflat-lay widthinstead of the full circumference. Here's how to tell the difference:
Large number(e.g., 49in / 124cm+) → likely the actual chest circumference
Small number(e.g., 24in / 62cm) → likely the flat width (garment laid flat and measured edge to edge)
Step 3: Note Your Ideal Numbers Write down the chest and length measurements from your best-fitting shirt. Care about sleeve length or shoulder width too? Note those down as well.
Step 4: Match to Our Size Chart Now check Seakoff's size chart and pick the size whose measurements are closest to your notes. That's it — no more guessing.
Works for Everything This same method applies to hoodies, sweaters, jackets, and more. Do it once, and you'll be able to shop confidently, anywhere — every time.
