X
Mon-Sat 8am-5pm PT
FREE SHIPPING ON ORDERS OVER $50More info
JOIN OUR EMAIL LISTSign Up
Bike Tires Direct logo. Link to homepage.
Serving cyclists
since 2002
CLICK HERE to join our Email List and get 15% off your first order*
*Restrictions Apply. Click for details.

Crumbs

Product Images

Castelli Womens Merino Seamless Baselayer Black
Castelli Womens Merino Seamless Baselayer Black
Castelli Womens Merino Seamless Baselayer Black
Castelli Womens Merino Seamless Baselayer Black
Castelli Womens Merino Seamless Baselayer Black
Black
Click Here for Larger Image
Castelli Womens Merino Seamless Baselayer 1
Castelli Womens Merino Seamless Baselayer 2
Castelli Womens Merino Seamless Baselayer 3
Castelli Womens Merino Seamless Baselayer 4
Castelli Womens Merino Seamless Baselayer 5

Castelli Women's Merino Seamless Baselayer

(3)

Pricing and Order Section

Mfg PartNum:
Closeout
Save 5%, 10%, or 15% more with purchase of 2, 3, or 4+ closeout items.
SALE: $48.36
MSRP: $99.99
That's 52% off
In Stock
Ships Free!
This size is not eligible for VIP points
Price matches are is not eligible for VIP points
 

Description

All Warmth, No Stitch Itch

The Castelli Women's Merino Seamless Baselayer provides seamless comfort with a lightweight merino wool blend. Ideal for cold days to provide warmth and moisture management to keep you comfortable.

Features:

  • Merino wool blend
  • Seamless construction for comfort and fit
  • Machine washable
  • Low collar
  • Weight: 171 g
  • Temperature: -4°C - 10°C / 25°F - 50°F
  • Fit: Regular

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.

Discount Codes are not applicable to Closeouts. Please see our Return Policy for closeout items.

This product is NOT Eligible for VIP Points.

Size Chart

XSSMLXL2XL
Chest32¾"-34¼"34"-36"35½"-37½"38"-40"40½"-42½"43"-45"
Waist25¾"-27¼"27"-29"28½"-30½"31"-33"33½"-35½"36"-38"
Hips34¾"-36"36"-38"37½"-39½"40"-42"42½"-44½"45"-47"

Specifications

Sleeve Type: Long Sleeve 

Black - S/M

Mfg PartNum: A4524555010-2 

Black - L/XL

Mfg PartNum: A4524555010-4 

Reviews

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
(2)
(0)
(1)
(0)
(0)
(67%)
(0%)
(33%)
(0%)
(0%)
Reviewed 12/29/2025
by ROBERT
PNW
Overall Rating
Light warm and on sale

I bought this wool base layer for myself (men's) and loved it so I bought the women's for my wife. She's 5'3" and small fits, sleeves are long but they are tight fitting so she can cuff them up. Great moisture management and adds quite a bit of warmth under a LS jersey for how thin and light it is. Men's has a higher collar then women's model.

Was this review useful to you? Yes/No
Thank you for your feedback.
Reviewed 12/18/2025
by RJM
Cycling Enthusiast
Columbia City, OR
Value Rating
Overall Rating
Great base layer

This is stretchy and warm. The shirt is thin and not too bulky.

Was this review useful to you? Yes/No
Thank you for your feedback.
Reviewed 3/10/2025
by San Diego Cyclist
San Diego California
Overall Rating
Runs small

If you normally wear a medium Castelli get the large/extra large. The sizing is awful. The under shirt is nice, just awful sizing

Was this review useful to you? Yes/No
Thank you for your feedback.
additional content loading
additional content loading
additional content loading

We are committed to delivering outstanding value and service to our customers, every day.
Try us today to see why so many of our customers come back again and again.

*Orders received before 3:00PM Pacific time are shipped the same day (Mon-Fri). Orders over $50
are shipped free (USA only, excluding AK and HI). Some exceptions apply. See Shipping for details. 1

5741 NE 87th Ave (I-205 exit 23B) Portland, OR 97220 | (503) 917-0156 | [email protected]