DownUnder™ Merino Mid Zip Top

ITEM # PG-10434

Regular Price: $109.95

Special Price: $65.97

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    Regular Price: $109.95

    Special Price: $65.97

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  • downunder-merino-top-black-base-layer
  • downunder-merino-top-black-base-layer


Packing for a week’s mission into Montana’s Great Bear Wilderness calls for exactitude. Warmth is king. Whiskey packs more bang than beer. And odor-free is the best gift you can give to your tenting accomplices. Stick to the essentials this season with the ingenious warmth-to-weight performance of Simms’ Downunder Merino layering system. The Mid Zip Top regulates body temps across high-altitude ups and downs, while flat seam construction combined with flatlock stitching delivers natural stretch and comfort for a full range of fishing motions.


  • Warmer, 18.5 micron, 260gm unbleached Merino wool with softer hand for the best warmth and moisture management
  • Flat seam construction
  • Flatlock stitch stitch provides great natural stretch & recovery
  • Natural fiber is odor resistant
  • Fabric Tech: 100% Merino Wool
  • Approx Weight: 10 oz./260 g/m2
  • Sizes: S/20, M/30, L/40, XL/50, XXL/60
  • Sizes: S–XXL


Product Care

Merino Wool Product Care

Machine-wash cold, tumble dry low. Fabric softeners not recommended.

Flipping items inside out when washing can prolong the look and feel of the fabric.



  • Merino wool is exceptional for performance outdoor wear because the fabric is excellent at regulating body temperature by keeping you warm on cold days and cooler on warm days. It has an excellent warmth-to-weight ratio compared to other wools, in part because the smaller fibers trap body heat. It draws moisture (sweat) away from the skin to provide excellent moisture management, the wool fiber absorbs and releases 10X the moisture of synthetic fibers. The extrafine fibers of Merino wool offer comfortable, no shrink next-to-skin layering without itch or odor.


Customer Reviews

3 Review(s)

2 Item(s)

Great product Review by Todd from Maine
After taking an unsuspecting dip in Canada's Grand Cascapedia last Fall a friend gave me this zip top, it warmed me up immediately. As I head back this year I had to have one for myself. Its lightweight, soft and a must have quality layer.

(Posted on 9/11/14)

Excellent. Review by Beartooth Bobby
A very nice addition to not only fishing comfortably but it looks great on. Have both colors!! Nice job SIMMS!

(Posted on 3/3/14)

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