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Castelli Mens Unlimited 18 Sock Defender Green
Defender Green
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Castelli Men's Unlimited 18 Sock

Pricing and Order Section

Mfg PartNum:
(2 customer reviews)
Save 5%, 10%, or 15% more with purchase of 2, 3, or 4+ closeout items.
SALE: pr. $9.99
MSRP: $19.99
SAVE 50%
In Stock Now
This color/size is not eligible for Podium Club points
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Keep It Fresh

Castelli's Unlimited 18 Sock is a classic, mid-cuff cycling sock featuring a midfoot support band, reinforced heel and toe sections and antimicrobial Q Skin fabric to keep things fresh.


  • Q Skin yarns with antimicrobial silver ions to reduce odor
  • Pique ankle knit
  • Reinforced heel and toe
  • Midfoot support band
  • Available in a variety of colorways
  • Sizes: S/M-2XL

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.

This product is NOT Eligible for VIP Points.

Size Chart

Shoe Size35-3940-4344-47   



Cuff Height: Crew 


Fabric Type: Synthetic 

Defender Green - S/M

Mfg PartNum: R4522037346-2 

Defender Green - L/XL

Mfg PartNum: R4522037346-4 

Defender Green - 2X-Large

Mfg PartNum: R4522037346-6 


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Comfortable but fragile
by Andy
Portland, OR

On sale, so I gave them a go. While the soles are sturdy and have held up nicely, the same cannot be said for the leg, which began fraying on me almost immediately. Giving them a 3/5 since they're still functional even though their appearance is kinda shot.

Reviewed 10/6/2022
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Excellent fit and look.
by Anonymous
Competitive Racer
Bend, OR
0 of 1 customers found this review helpful.

I like the fit and I like the look. I have dozens of socks, and my faves are Castelli.

Reviewed 8/19/2022
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