PEARL IZUMI Men's Merino Thermal Long Sleeve Cycling Base Layer


  • HIGH PERFORMANCE: Our heaviest (250g/m2) long sleeve base layer for men is intelligently designed to keep you comfortable at peak performance in cold weather on and off the bike
  • MATERIALS: Unique fabric construction places polyester fibers against your skin to improve wicking, and Merino wool facing the jersey for temperature regulation
  • DURABLE: Base layer shirt with strong polyester fibers are the foundation that helps handle the elements season after season
  • VERSATILITY: Uses a set-in sleeve design for a versatile form-following fit to make layering easy.
  • 100% SATISFACTION GUARANTEE: All our products are manufactured with the highest quality materials to the best quality standards; but if for any reason you want to make a return we are here to help you!


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This is our heaviest base layer, at 250g/m2. It combines our 18.5-micron responsibly sourced Merino and recycled polyester technical fibers in a remarkable construction that positions the polyester next to your skin for maximum wicking while the wool faces out for superior insulation. With its long sleeves it is the ideal garment to layer beneath one of our AmFIB jackets. Thumb loops keep the sleeves in place as you pull on your jersey.

Product details
  • Department : Mens
  • Date First Available : July 24, 2019
  • Manufacturer : PEARL IZUMI
  • Amazon Best Sellers Rank: #810,956 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
    • #3643 in Men's Outdoor Recreation Shirts
    • #1512 in Men's Cycling Jerseys

I'm 6' and just under 190 pounds and bought an XL. And it's a little small. I can still wear it, and I like the performance aspect, but don't understand why the sizing on so many bike tops don't follow other shirts. I wear a size large in all my cotton t-shirts and polo style tops, and they fit perfectly. I also bought a wool cycling jersey recently in XL, and it too is overly snug. Sorry, but no way do I consider myself to be a XXL. Even at the 230 pounds I was last year, a size XL was all I ever bought for my non-cycling shirts.

I like the performance this base layer provides, but taking off one star for the sizing.

My son has always worn a size XL in shirts, and he has owned other Pearl Izumi cold weather cycling shirts. This shirt, however, was very small on him. He is tall and lanky, and so I thought that this would fit well. The body is tight and short, and the sleeves are short as well. Having said this, he was very sad that the shirt did not fit. The quality of the shirt is wonderful, and it was exactly what he had hoped for.