Terramar Helix Half-Zip Shirt

1 review
5-star:   0
4-star:   0
3-star:   1
2-star:   0
1-star:   0



Works well when worn in conjunction with other layers.

Rating: rated 3.5 of 5 stars
Source: received it as a personal gift


Works well when worn in conjunction with other layers. This is a base layer and when combined with short sleeved shirt underneath and rain shell or down on top, you'll be prepared for most situation


  • Great fit
  • Lightweight
  • Sweat-wicking


  • Not great worn alone

This is a base layer, but should not be confused with layers such as Under Armour necessarily. This is not skin tight, but does hug the body more than other layers may.  When I wear this with a shirt (perhaps on cooler mornings) or with a shirt and jacket (those 40 degree days), it works well. I am 5'9", 150 lbs. and a medium fits perfectly.

I used this on a recent trip to Glacier National Park. I wore it in the mornings with my down, but once lunch came around, it was closer to high 50s, low 60s.  I took my jacket off and just had a cotton shirt and my Helix; combined with my pack and constant hiking I was comfortable. 

The shirt also breathes well and scores high for me on its moisture-wicking capabilities. On that note, if it's breezy, you may chill off a bit more than you wanted. The Helix isn't waterproof and the water resistance is minimal, no more than you would really expect; it'll bead up, but then become saturated after time.

It has a little UPF protection (25 per their site). While it is thinner, it seems pretty well made it that it doesn't snag and leave holes or "hoop" out any of the material if snagged on bushes or logs.

I would not think again about getting another pair. This was a gift and once I looked up the price, it is very reasonable when it comes to the cost of other base layers of this kind.  

Manufacturer's Description

Visit Terramar's Men's Helix Half-Zip Shirt page.

Retailers' Descriptions

Here's what other sites are saying:

CLOSEOUTS . Incredibly moisture-wicking and quick-drying EC2and#174; electrostatic evaporation fabric technology makes Terramar's Helix 1.0 Thermolator top the ultimate in high-performance, lightweight base layers -- keeping you warm, dry and comfortable in a variety of conditions. Available Colors: BLACK. Sizes: S, M, L, XL, 2XL.

- Sierra Trading Post refers to the men's version

Terramar Body-Sensors Helix Underwear: Engineered two-sided micro denier polyester construction creates air pockets for improved insulation and rapid moisture transport. Lightweight temperature control layer is designed as a stand-alone layer in cool weather or as the foundation of a multi-layering system. The Terramar Women's Body-Sensors Lightweight Half Zip is fast drying and highly breathable so you will stay warm and comfortable whereover your adventurous spirit take you.Constructed of soft 100% micro polyester with two sided knit construction.Designed to create air pockets for improved insulation and moisture transport.Lightweight temperature control layer prevents moisture build-up during intense workouts. ec2 Qwik-Dri Thermoregulation Comfort Technology is an electrostatic process that allows for moisture movement without the garment touching the skin.Versatile 1/2 zip mock with zipper garage lets you zip up for maximum heat retention and unzip for ventilation.Saddle shoulders allow a full range of motion without binding. Drop contoured back panel for performance fit stays tucked in; increased coverage for active sports. Soft, breathable and fast drying.Antimicrobial finish for odor control.Flatlock seam construction for comfort and durability; soft and non-chafing next to skin.Tagless to feel soft against your skin.Fabric provides UPF 25+ sun protection, shielding skin from harmful ultraviolet rays.Lightweight designed to meet your performance level; for wear in cold to very cold temperatures with medium to high activity.Avg. weight: 3.9 oz.Import.

- Campmor refers to the men's version

This lightweight temperature-control layer prevents moisture buildup during intense activity. Helix garments work as a stand-alone layer in cool weather or as layering in more frigid conditions. Highly breathable and fast-drying. Won't cling to skin. Fabric features: 100% Micro Denier Polyester, Anti-microbial. Fabric Weight: 130 grams 3.9 oz, UPF Rating 25+

- SunnySports refers to the men's version

Terramar Helix Half-Zip Shirt

previously retailed for:
$11.95 - $17.99

The Terramar Helix Half-Zip Shirt is not available from the stores we monitor. It was last seen December 27, 2013 at Sierra Trading Post.

If you're looking for a new long sleeve performance top, check out the best reviewed current models.