Size Guide
| SIZE | MEDIUM | LARGE | X-LARGE |
|---|---|---|---|
| US MEN | 6-9 | 9.5-12 | 12.5-15 |
| US Women | 7-9.5 | 10-13 | - |
Not sure which size to choose? If you're between sizes, we recommend sizing up.
To request a return within 99 days of purchase, use our contact form or email our team. A $7.99 shipping and handling fee applies, and return shipping costs are not covered. See our returns and exchanges instructions for the complete conditions.

What our customers are saying.
YOUR QUESTIONS ANSWERED
Why does alpaca perform better?
After years of testing against cotton, wool, and synthetics, alpaca stood out for keeping feet dry, comfortable, and odor-free. Its hollow-core fibers wick moisture, regulate temperature in both heat and cold, and naturally resist odor, so you can wear them longer with fewer washes. Softer than wool and more breathable than synthetics, alpaca delivers all-day comfort without the itch.
How should I wash my Hollow Socks?
When caring for your Hollow Socks, we recommend washing in cold water and hanging to dry. (Note: machine washing and drying tests have shown no damage.)
How do I know what size to get?
Hollow’s sizing guide: Medium: Men 6-9 (US) | Women 7-9.5 (US) Large: Men 9.5-12 (US) | Women 10-13 (US) Extra Large: Men 12.5-15 (US)
What is your return policy?
Within 99 days of purchase, you can request a return or exchange for unused items. Provide your order number and proof of purchase through our contact form, or follow our returns and exchanges instructions. A $7.99 shipping and handling fee applies; return shipping costs are not covered. For product issues or questions, email [email protected].
What is the Hollow warranty?
If there’s a defect or issue with your socks, we’ve got you covered. We’ll replace any pair with a product error within 99 days of delivery—no hassle, no stress.
How long does standard shipping take?
Most orders arrive within 7 business days. Occasionally, delays can happen due to circumstances outside our control, like weather, holidays, or remote locations.