*Free shipping on orders over $99

Free Shipping Policy

Free Shipping applies to all orders placed for $99 and above
(pre-tax value). Some restrictions apply:

  • Offer valid in the Lower 48 States only
  • Excludes Complete Bicycles, Framesets, and some other oversize items

Clothing Baselayers - Mens

Pearl Izumi Merino Thermal Long Sleeve Baselayer

Three key aspects define Pearl izumi's Merino products. First is sustainability in the fabric cycle. Second is the anatomic construction process with smooth transitions and seams. Third is proper breathability to the fabric blend itself. Not all Merino products are made equally. Of course you also get the full attention to detail that the designers bring to bear across the line-up. The Merino Thermal Long Sleeve Baselayer is the warmest, heaviest (250g/m2) baselayer Pearl produces, and it is a perfect complement to the highly breathable AmFIB material jackets during the cold, wet, shoulder and winter training seasons.

The Merino Thermal combines Pearl's 18.5-micron responsibly sourced Merino wool and recycled polyester technical fibers in a remarkable Transfer Merino fabric construction that positions the polyester next to your skin for maximum wicking. This is the key to keep the moisture off the skin. The wool faces out for superior insulation and is a conduit for moisture release to the next layer. With its long sleeves the Merino Thermal is the ideal garment to layer when warmth and moisture transfer is key. One detail we all can appreciate is the thumb loops that keep the sleeves in place as you pull on your jersey. The cut is truly form fit, for optimal next to skln performance and minimal bulk when layering. The short front and long back favor a moderate to aggressive cycling position.

Wool has long been known as nature's technical fiber. One challenge for wool is that it can hold moisture close when layers are compressed over the top. While it doesn't lose it's thermal properties, moisture can stay close to the skin. The proper use of the polyester closest to the skin eliminates that challenge and allows the 18.5 Merino to deliver more warmth than you'd expect. That is informed and intelligent textile development and Pearl has always been an industry leader in this regard. Stay drier and warmer with the Pearl Izumi Merino Thermal Long Sleeve Baselayer.


  • Form Fit cycling cut wool/polyester fabric insulating (250g/m2) baselayer
  • Pearl's heaviest weight baselayer with superior moisture transfer
  • Mid-weight Transfer Merino fabric combines wool and recycled polyester for sustainable technical performance
  • Unique plated fabric construction places polyester next to skin and merino on the exterior for superior moisture transfer and thermal regulation
  • Made using fine 18.5-micron merino wool for superior comfort
  • Recycled Repreve® XS Polyester technical fibers are made from recycled plastic water bottles
  • Anatomic cut, construction matched with fabric stretch capabilities for close fit
  • Cuffs, hems, and neckline feature low-bulk folded, soft edges
  • Set in sleeve, thumb loop construction for easy layering and versatility
  • Fabric: 65% recycled polyester, 35% merino wool
  • Please follow all care instructions for long-term durability, fabric performance
  • Sizes: Small, Medium, Large, XL
  • Color: Black
  • Weight: 229 grams (Medium)
Mens Shorts, Bibs, Knickers & Tights
Mens Jerseys, Jackets & Vests
Womens Shorts, Bibs, Knickers & Tights
Womens Jerseys, Jackets & Vests
Men's Shoe Size<66.5-88.5-1010.5-1213+

Width refers to palm circumference measurmant taken around the widest part of the palm, just below the knuckles.

Mens Socks
Womens Socks