• SYSUM Men's Merino One Long Sleeve - Front
  • SYSUM Men's Merino One Long Sleeve - Flat Front
  • SYSUM Men's Merino One Long Sleeve - Flat Back
  • SYSUM Men's Merino One Long Sleeve - Back
  • SYSUM Men's Merino One Long Sleeve - Detail Front
  • SYSUM Men's Merino One Long Sleeve - Detail Back
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Men's Merino One Long Sleeve

£115
£115
Lightweight, soft, and breathable
More info
Please select a size In stock
Size & Fit
SYSUM Men's Merino One Long Sleeve - Detail Front
SYSUM Men's Merino One Long Sleeve - Detail Back

  • Our Men’s Merino One Long Sleeve Running Tee is ideal for warm weather or as a light thermal base layer for colder conditions. The long sleeves provide additional coverage from the sun or warmth during cooler, windy conditions.

    With a 90 g/m² blend of merino wool and recycled polyester, it naturally regulates your body temperature. The tee retains moisture in warm weather, reducing excessive sweating and hydration needs, while trapping heat when worn as a base layer in colder conditions. Naturally odour-resistant and antibacterial, it’s perfect for multi-day use with minimal washing.

    With minimal construction for comfort, this men’s tee features a contoured fit for optimal fabric performance. Flatlock shoulder seam on the front reduce irritation under a vest pack, while angled side seams ensure a precise, comfortable fit.

    Wear with any of our Thermo Layer Tees to find your perfect temperature combination.

  • Body
    50% Merino Wool / 50% Recycled Polyester
    Stitching
    100% Recycled Polyester
    Weight
    108g / 3.81oz (Size Medium)
    Production
    Made in Portugal
  • Washing Machine wash at 30°C
    Bleach Do not bleach
    Drying Do not tumble dry
    Dry clean Do not dry clean
    Iron Iron inside out on low heat
    We promote hand washing and hang drying to help reduce the amount of micro plastics getting into the oceans.
  • Fabric
    Responsibly sourced Merino wool from Sudwolle Group & GRS Certified post-consumer Recycled Polyester (Made from bottles)
    Production
    Manufactured ethically in Portugal
    Shipping
    All production items are shipped to us by land or boat
    Packaging
    Made from FSC-certified renewable wood fibers & Recycled paper materials, 100% plastic free, 100% recyclable with paper or cardboard
  • SYSUM Men's Merino One Long Sleeve - Front
    Hakan is 188cm6' 2" and wears a size L
    • Tailored fit to maximise performance
    • Select a size up if you prefer a baggy fit
    • Measurements relate to your body size
    • CM
    • IN
    • Size
    • S
    • M
    • L
    • XL
    • Chest
    • 92
    • 36"
    • 97
    • 38"
    • 102
    • 40"
    • 107
    • 42"
    • Waist
    • 76
    • 30"
    • 81
    • 32"
    • 85
    • 34"
    • 91
    • 36"
    • Free UK standard shipping on orders over £200
    • Free & easy returns
    • Worldwide shipping
    • 14 day Returns policy

    Review our Delivery & Returns pages for more info. If you have any further questions, please contact us.

  • Thermo regulating
  • Naturally odour-resistant
  • Perfect for all-season layering
  • Distraction-free seam placement
  • Reflective back logo
  • Lightweight 108g / 3.81oz
Conditions
  • Cold
    Cold
  • Wind
    Wind
  • Wet
    Wet
  • Hot
    Hot
Temperature
  • -10ºC
    -10ºC
  • 0ºC
    0ºC
  • 10ºC
    10ºC
  • 20ºC
    20ºC
  • 30ºC
    30ºC
  • SYSUM Mens Merino One Long Sleeve - Shoulder Seam
  • SYSUM Mens Merino One Long Sleeve - Side Seam
  • SYSUM Merino One - Care Label
  • SYSUM Merino One - Reflective Light
    SYSUM Merino One - Reflective Dark
Shoulder Seam: Featuring a single front drop shoulder flatlock seam positioned to minimise irritation when wearing a vest pack.
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Side Seam: All of our tees feature a slightly angled side seam for a contoured fit and to reduce back-sag when sweating.
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No Care Label: We printed the care label directly onto the garment to prevent irritation and avoid unnecessary fabric use.
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Reflective Logo: This Merino tee features a mid-back reflective logo for visibility when running in low light. It’s positioned to stay visible when wearing a vest pack.
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SYSUM Men's Merino One Long Sleeve - Flat Front