Icebreaker Men's Oasis Base Layer L/Sleeve Half-Zip Merino Shirt - Black

Size Guide
Size Guide Icebreaker Men's Tops

Measure Yourself:

Use the chart below to determine your size. If you're between two sizes, order the smaller size for a tight fit or the larger size for a looser fit. If your measurements for chest and waist correspond to two different sizes, order the size indicated by your chest measurement for tops and your hip measurement for pants.

 How to measure yourself:

  • Neck: Measure around the middle of your neck, leaving the tape loose.
  • Chest: Measure under your arms around the fullest part of your chest.
  • Arm Length: Measure from the back of your neck to the top of your shoulders, to your elbow, and down to your wrist bone.
Neck Chest Arm Length
Small (cm) 34-36 83-91 86.5-87
Small (in) 13-14 33-36 34
Medium (cm) 36-38 91-99 87-87.5
Medium (in) 14-15 36-39 34-34.5
Large (cm) 38-41 99-107 87.5-88
Large (in)  15-16 39-42 34.5
X-Large (cm) 41-43 107-115 88-89
X-Large (in) 16-17 42-45 35
XX-Large (cm) 43-46 115-123 89-90
XX-Large (in) 17-18 45-48 35.5
XXX-Large (cm) 46-49 123-133 90-91
XXX-Large (in) 18-19 48-52 36


Fit Guide:

Icebreaker have three different fits - slim, regular, and relaxed - ensure that when worn together, layers move and breathe like a single garment.

  • Slim Fit: A snug, close to body fit for low bulk layering.
  • Regular Fit: Neither snug nor loose - garments that are worn solo or over other layers.
  • Relaxed Fit: Loose fitting lightweight layers.

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The winter months won't seem as daunting when the ultimate do-it-all baselayer has your back.

The luxurious 200gm merino fabric naturally regulates your temperature - keeping you toasty in the cold weather, whilst also breathing freely when the weather heats up. The spectacular design also features a half-zip that can be swiftly opened for instant cooling relief. The set-in sleeves, offset shoulder seams and flat-lock stitching ensures maximum comfort while you're on the move - as well as a slightly longer back-bottom hem for a little extra coverage. It's a good thing that merino naturally resists odour so well - because you will definitely want to wear this baselayer every single day.

  • The 200gm, lightweight jersey merino fabric offers breathability, temperature regulation and odour resistance.
  • A half-zip provides instant cooling & ventilation.
  • The set-in sleeves, offset shoulder seams and flat-lock stitching ensures chafe-free comfort.
  • Slim fit.
  • 270 g / 9.52 oz.