Dynafit X4 Speed Sock

Where to Buy

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Retailers' Descriptions

Here's what other sites are saying:

Dynafit Men's X7 Speed MTN Sock FEATURES of the Dynafit Men's X7 Speed MTN Sock 2 Way Stretch Seamless Design Wicking Cooling Sikverized Technology Facilitates blood circulation and raises oxygen transfer in stressed

- Moosejaw

The same ridge you skin up in the winter becomes the venue for your summer runs when you slip on the Dynafit X4 Speed MTN Sock and let your feet do all the work. Between your foot and your trail running shoe, this ultralight sock provides the dynamic interface to keep your foot dry and ever-prepared for the next stride on the loose scree trail.

- Backcountry.com