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Pearl Izumi
Merino Thermal Sock

Mfg PartNum:
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Durable as a steel frame

Most Merino socks start great and go threadbare before the season is out.

But then most socks aren't made from a unique blend of Merino wool and polyester sourced from recycled plastic water bottles. The result is a sock construction that's durable as a steel frame.

That's not to say the Merino Thermal Socks are hard to the touch or heavy on the feet. With a double weight knit and flat seam, they are soft, warm, and comfortable under any pair of cycling shoes, no matter the season or terrain ahead.

Features & Specs:

  • Transfer Merino fabric combines wool and recycled polyester for sustainable technical performance
  • 18.5-micron fine Merino Wool Repreve Recycled Polyester created from recycled plastic water bottles
  • Double weight knit for extra warmth
  • Flat toe seam construction provides superior comfort over toes
  • Anatomic arch compression for a performance fit
  • Tall cuff height (21 cm) unisex sizing
  • Fabric made in USA

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.

This product is NOT Eligible for VIP Points.

Pearl Izumi Merino Thermal Sock
A newer version of this product is available.
Shoe Size6-88-1010-12   

Weight: 0 grams


Cuff Height: Crew 


Fabric Type: Wool / Wool Blend 

Phantom Core - Small

Mfg PartNum: 143519016PWS 

Phantom Core - Medium

Mfg PartNum: 143519016PWM 

Phantom Core - Large

Mfg PartNum: 143519016PWL 

Phantom Core - X-Large

Mfg PartNum: 143519016PWXL 

Smoked Pearl Core - Small

Mfg PartNum: 143519016PVS 

Smoked Pearl Core - Medium

Mfg PartNum: 143519016PVM 

Smoked Pearl Core - Large

Mfg PartNum: 143519016PVL 

Smoked Pearl Core - X-Large

Mfg PartNum: 143519016PVXL 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Great merino cycling socks
by Anonymous
Portland, Oregon

I really love these socks. They work great for everyday cycling and excel in colder weather. I have pretty wide feet and cycling shoes are always on the snug side. These socks are not as thick as regular hiking socks, so fit in my cycling shoes okay without limiting circulation. And you get all be temperature and odor benefits of wool. These are my go to socks for just about all my days on a bike. Use them in regular road shoes and my winter cycling boots.

Reviewed 1/6/2022
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Excellent cool/cold weather sock
by Joe D
North GA

Really enjoying these socks. They fit great, and are kind of an intermediate weight so I can wear them in my summer shoes which are pretty snug. They have been a great sock for 40 to 50� weather and I�m looking forward to taking them down into the 30s with booties, etc

Reviewed 1/14/2022
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Super comfortable socks
by Brian
Cycling Enthusiast

These socks are really comfortable and pretty warm, but you'll still need to layer in insulated shoes and/or shoe covers when it's really cold out. I wish socks weren't as expensive as they are so I could stock up on more, but they're worth it.

Reviewed 12/13/2021
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They work!
by Greg D
Tijeras, NM

Most wooly socks just get my feet wet and keep them cold but these actually wick sufficiently to keep my feet dry and therefore warm, with booties of course.

Reviewed 1/18/2022
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Nice Fit
by M
Cycling Enthusiast
SE Virginia

Nice lighter weight sock that fits my size 13 well.

Reviewed 1/14/2022
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great fit and comfort
by Anonymous
Cycling Enthusiast
san luis obispo
1 of 1 customers found this review helpful.

biking every day and only sock I use now.

Reviewed 4/6/2020
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