The UnDShurt is thin and form-fitting, engineered for wearing as the first against-the-skin base layer. Made in the USA from moisture-wicking fast-drying fiber. Suitable for temperatures from 40F to 80F (4C to 27C).
100% Polyester. Machine wash cool, tumble dry low. No bleach, softeners, or harsh detergents.
**Measure around the fullest part of the chest, under the arms, and including shoulder blades.**
| DeFeet | SM | MD | LG | XL |
| USA | 34 - 37 in | 37 - 40 in | 40 - 43 in | 43 - 46 in |
| EU | 86 - 94 cm | 94 - 102 cm | 102 - 109 cm | 109 - 117cm |
When will my order ship?
We ask that you allow 1-2 business days for our team to pack & ship your full order. However, during special promotions and holidays this time may be increased. DeFeet offices are typically closed on major holidays and orders placed after 12 pm EST the day before the holiday will not begin processing until the next regular business day. If you want to double-check on your order status, send us a note at support@defeet.com.
Where do your products ship from?
All orders will ship from our factory in Hildebran, North Carolina.
How much does shipping cost?
For US orders, we offer a few flat rate shipping methods, as well as free shipping* within the United States for orders totaling $100.00 or more.
* Free shipping does not apply to custom orders.
**Please note, UPS will not deliver to PO boxes!**
For international orders, costs will vary based on location. We offer FedEx International Economy and Priority as shipping options, with duties/taxes prepaid at time of purchase.
How long will it take for my order to arrive?
Orders will typically arrive in 2-10 business days for US orders, depending on the shipping service selected. International orders will arrive in 3 - 7 business days, depending on the shipping service selected. Once orders leave our warehouse, we do not have the ability to make changes. To double check ETA and shipping speeds to your location, reach out to our team at support@defeet.com.
Does DeFeet ship to APO/FPO/DPO Addresses?
Yes! We can ship to you using USPS. Use the “City” field to specify APO, FPO or DPO and the “State” dropdown to select Armed Forces (Americas/Europe/Pacific).
Why DeFeet?
Made in USA: We knit our socks right here in our North Carolina microsockery.
Locally Sourced: Our socks are manufactured from USA-grown merino wool and locally recycled fiber.
Customization: Since the beginning, we’ve offered DeFeet quality with custom design.
Innovation: We design for performance, durability, and comfort, seek out new fibers, and experiment with methods of construction.
★★★★★Climber BillThese Are My Go-To Socks
Woolie Boolie 6"
For much of the year, these are my go-to socks for mountain biking. If temperatures are moderate these socks do well in warm or cool weather. They breathe well, don't get sweaty or stinky, offer good padding... and they are durable! I do a lot of tough riding and these socks are battle tested.
★★★★★BlauerPlumsMy Favorite Cycling Socks
Aireator
The fit and finish of these socks is brilliant. I mainly use them for commuting and probably cycled about 3000 km with them already. They still are holding up well. Also, they work well with my Shimano mountain bike XC50 cycle shoes. My feet are dry and comfortable. Some socks are numbing my feet quite quickly - those socks do NOT. The high vis option is a great plus for me. I would absolutely recommend them!
★★★★★Barbara K.Nothing in everyday life isNothing in everyday life is quite as nice as pulling on a new pair of socks. The Ventoux 6” hugs your feet and let’s you know there’s no mountain you can’t tackle. The fibers are comfortable, breathable, and snap into place every use.
