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The softest cuddliest top you will ever wear!


A soft, cozy long sleeve base layer top perfect for wearing under a dry top. 

The Men's Long Sleeve Thick Skin Fleece Top is a warm base layer top for the coldest conditions. 4-way stretch polyester fleece is extremely soft. Modeled after a surfer's “rash guard,” this form-fitting layer keeps you toasty without being restrictive. This quick-drying base layer keeps you warm even when wet. Perfect under a jacket, dry top, or dry suit.



  • Soft, warm 4-way stretch fleece
  • A form-fitting cut provides warmth without bulk
  • Flatlock seams to prevent chafing
  • Turtleneck collar to keep that cold neck gasket off your neck
  • Size variations to fit people of most shapes and sizes (S-XXL)


Technical Specs

  • Fabric: 4-way stretch double-sided anti-pilling microfleece
  • Fabric Content: 64% polyester, 29% recycled polyester, 7% spandex
  • Fabric Weight: 258g/m²

Immersion Research Thickskin Thermal LS Fleece

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