Icebreaker Oasis LS Crewe size XL in numerous colours. 
The Mission Ready Tan variant is a very rare edition they made for the US SOCOM.

Weight: 250 grams
Fabric: 200 Lightweight 100% Merino Wool
Care: Machine wash with similar colours. Do not use softeners, do not use bleach. Dries fast in the shade, do not tumble dry. Do not dry clean. Exact instructions on the care label.

Features:
  • Most versatile base layer
  • Offset shoulder seams prevent pack rub
  • Flat-lock seams prevent chafing
  • Drop tail hem for added coverage
  • Icebreaker heat transfer logo