Icebreaker Merino Men's Oasis L/Sleeve Crewe Thermal Base Layer - Monsoon

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.

The Oasis - a versatile base-layer for the everyday explorer.

The set-in sleeves, offset shoulder seams and flat-lock stitching offers exceptional comfort - whatever the adventure. The breathable 200gm merino cleverly regulates temperature, manages moisture and resists any odour - so you not only look great, but feel great for days at a time. The lightweight 200gm 100% Jersey Merino fabric offers versatility, softness and breathability.

  • A slim fit contours to your body for a movement-orientated fit.
  • Ideal for snow sports, hiking, travel & outdoor lifestyle.
  • 232 g / 8.18 oz.