• Online:
  • URL for this product:
  • From the U.S. and CanadaCall 1-800-426-4840
  • Mon. through Sun., 4 a.m. through 11 p.m. PT.
  • InternationalCall 1-253-891-2500
  • Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.

SmartWool PhD HyFi Vest - Women's

This item is currently sold out or unavailable online.

Or, may we suggest shopping for similar items:

Shop more Women's Running VestsShop more SmartWool

This page is provided for reference to historical product information.

Keep your core cozy with the SmartWool PhD HyFi vest, which uses wool's natural performance to offer plenty of comfort along with a tough outer fabric face to ensure lasting use.

  • Bi-component construction places wool next to the skin to maintain moisture-wicking, heat-regulating comfort; nylon facing increases resilience and abrasion resistance
  • Full-length zipper with draft flap lets you easily regulate core temperature; chin guard ensures comfort
  • Zippered hand pockets securely stash essentials
  • Semifitted cut of the women's SmartWool PhD HyFi vest is not too tight and not too loose


Item 834156


This item's hot - and it's only available online.

REI Membership

SmartWool PhD HyFi Vest - Women's Specs
Best use
Wool / wool blend
64% merino wool/36% nylon
Fabric type
Sun-protective fabric
Moisture wicking
Quick drying

SmartWool PhD HyFi Vest - Women's

Loading Ratings & Reviews...

SmartWool PhD HyFi Vest - Women'sis rated4.0out of5by1.
Rated4out of5byfromGlad I tried this!Until recently, I'd never understood the appeal of vests, and didn't really like the look of them. However, I've started doing tai chi and taking riding lessons this winter and decided that I really wanted extra warmth without any restriction in my shoulders. I settled on this vest, and it's awesome - thanks to the nylon the fabric is really smooth and will hopefully last forever, but it still has the insulating qualities of wool. It does run a little larger than Smartwool baselayers (presumably so you can wear it over the baselayers), but within reason, so I ended up with the same size that I usually wear. And thanks to the sleeker look and lack of bulk, I don't feel like I'm wearing a vest at all. The only reason I took off a star was the lack of color options.
Date published: 2013-01-22

Ask a question and have it answered by REI product experts and fellow outdoor enthusiasts. Need immediate assistance? Use Live Help.

Loading Questions & Answers...

How are we doing? Give us feedback on this page.

FREE SHIPPING With $50 minimum purchase

MEMBERS, EARN A $20 BONUS CARD! When you spend $100 April 14-29. Single-use bonus card redeemable May 2-12. Details
  • Join REI today!
  • REI Membership
  • REI member benefits include an annual refund (typically 10% on eligible purchases).
  • Join REI today!
  • Sign up for REI Gearmail®
  • and get 15% off selected items!
  • Store Locator
  • Locate an REI store near you.
  • Find a Store
© 2014 Recreational Equipment, Inc. All rights reserved. REI, the REI Tree and Mountain design, Novara, and
REI Adventures are trademarks of Recreational Equipment, Inc.

Find REI on: FacebookTwitterYouTubeFlickrMobile site