sitka gear|SKU:20-10074-EV-M-var-51374-829a13

Sitka Gear Merino Heavyweight Half-Zip — Static Cold-Weather Insulation

Cold-Weather Stealth Starts Next to Your Skin

17.5-micron merino wool — Fine-grade face for warmth and comfort
Gore Optifade concealment — Scientifically proven animal-vision pattern
Natural odor resistance — Wool fibers fight scent at the source
Polyester interior backing — Pulls moisture off skin during sits
Center half-zip vent — Dump heat without unlayering on stand
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Price range: $84.50 through $118.30

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In the box

  • Sitka Gear Merino Heavyweight Half-Zip
Merino Heavyweight Half-Zip Baselayer
Sitka Gear Merino Heavyweight Half-Zip — Static Cold-Weather Insulation
$84.50 – $118.30Price range: $84.50 through $118.30

Cold-Weather Stealth Starts Next to Your Skin

The Sitka Gear Merino Heavyweight Half-Zip is built for static sits in cold weather where staying warm and undetected matters. The 17.5-micron merino wool face carries Gore Optifade concealment, while the soft polyester interior keeps you comfortable against the skin. Natural odor resistance from the wool adds another layer of stealth. This is a season-proven, wilderness-grade baselayer that handles a wide range of cold conditions without compromise.

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Gore Optifade Concealment
Natural Odor Resistance
290-Gram Merino Blend
Half-Zip Ventilation
17.5 Micron
Merino Wool Face
290-Gram
Fabric Weight
59%
Merino Face Blend
Season-Proven Warmth When Synthetics Fall Short

Season-Proven Warmth When Synthetics Fall Short

Most base layers look good in a product photo and then leave you shivering on a late-November whitetail sit when the wind shifts and the temperature drops fifteen degrees in twenty minutes. Hunt Premium doesn't stock gear that fails that test. The Sitka Gear Merino Heavyweight Half-Zip earned its spot because it's season-proven through static sits in sub-freezing conditions where synthetic layers fell short. The 17.5-micron merino face with Gore Optifade concealment delivers thermal retention and natural odor resistance that synthetic fabrics simply cannot match. We only carry gear we'd bet a cold-weather tag on — this half-zip makes that list.

290-Gram Construction Built for Long Cold Sits

290-Gram Construction Built for Long Cold Sits

The 290-gram fabric blends 59% 17.5-micron merino wool with a 6% nylon core-spun face and 35% polyester interior. That construction matters on a tree stand at dawn when temperatures sit in the low twenties. The merino face provides natural insulation and odor resistance — critical when deer are downwind at forty yards. The nylon core adds durability so the fabric holds up season after season without pilling or thinning. The polyester interior pulls moisture away from your skin during the hike in, then traps heat once you stop moving. This is a field-tested layer designed for the specific demands of static hunting in cold conditions.

Gore Optifade Concealment With Half-Zip Ventilation

Gore Optifade Concealment With Half-Zip Ventilation

Gore Optifade Concealment is the only pattern engineered around animal vision rather than human perception. The 17.5-micron merino face carries that pattern directly, so your base layer contributes to breaking up your outline — not just your outer layer. Combined with merino's natural odor-fighting properties, this half-zip addresses two of the biggest factors that end hunts early: being seen and being smelled. The center half-zip lets you vent heat on the hike in without exposing your core to cold air, then seal up once you reach your stand. Available in Elevated II, Marsh, and Timber patterns to match your specific hunting terrain.

Sizing & Layering Compatibility

Designed as a next-to-skin baselayer for cold-weather hunting systems.

  • Worn directly against the skin with no intermediate layers
  • Accommodates mid-layers and shell jackets worn over top
  • Available in sizes Small through 3XL for full range of builds

Hunting Applications

Engineered for the coldest sits of the season where movement is minimal and exposure is high.

Late-Season Whitetail Stands
Static Cold-Weather Hunts
Backcountry Cold Camps

Full specifications

At a glance

Dimensions
Small, Medium, Large, Extra Large, XXL, 3XL
Warranty
See product page
Full specifications6 data points across 4 categories

Dimensions

Sizes AvailableSmall, Medium, Large, Extra Large, XXL, 3XL
Colors AvailableElevated II, Marsh, Timber

Power & Performance

ClosureCenter half-zip for ventilation
ConcealmentGore Optifade

Materials

Fabric290-Gram 59% 17.5 Micron Merino / 6% Nylon Core-Spun Face Blend / 35% Polyester Interior

Compliance & Warranty

WarrantySee product page

The Hunt Premium Promise

Every product we carry is vetted for real-field performance. If it doesn't hold up when the temperature drops and the wait stretches on, it doesn't make the cut.

Authorized DealerFull manufacturer warranty honored on every product — no gray market, no exceptions.
Free ShippingShips free with signature confirmation on every order.
30-Day ReturnsReturn within 30 days in original packaging for a full refund.
★★★★★
“Wore this on a seven-day November whitetail hunt in northern Wisconsin — temps hit single digits two of those mornings. Never once felt cold on stand, even during four-hour sits. The half-zip was perfect for venting on the mile walk in. No scent issues even after wearing it two days straight. This is now my go-to cold-weather base layer.”
F
First L.Eau Claire, WI

The Sitka Gear Merino Heavyweight Half-Zip is the ideal next-to-skin layer for static hunts in cold weather. The 17.5-micron merino wool face of the Sitka Gear Merino Heavyweight Half-Zip is printed with Sitka Gear’s Gore Optifade concealment and backed with a soft polyester interior. The natural odor fighting capabilities of wool improves the Sitka Gear Merino Heavyweight Half-Zip concealment properties. You will quickly find out that the Sitka Gear Merino Heavyweight Half-Zip is a reliable next-to-skin layer that will work in a wide range of conditions. 

To complete the Sitka Gear Merino Heavyweight system, pair the Sitka Gear Merino Heavyweight Half-Zip with the Sitka Gear Merino Heavyweight Bottom.

FEATURES

  • Center half-zip for ventilation

SPECIFICATIONS

Breathability
Odor Control
Warmth
Moisture Wicking

Weight: 10.4 oz

Fabric Details: ­290-Gram 59% 17.5 Micron Merino / 6% Nylon Core-Spun Face Blend / 35% Polyester Interior

MPN: ­10074

Size Chart: ­Click Here

OPTIFADE ELEVATED II

Environment: Vegetated Terrain
Scenario: Elevated Ambush
Climate: Cold, Extreme Cold

OPTIFADE MARSH

Environment: Marsh/Field
Scenario: Dry Field, Wetlands
Climate: Cold, Extreme Cold

OPTIFADE TIMBER

Environment: Timber
Scenario: Open Water, Backwaters
Climate: Cold, Extreme Cold

TECHNOLOGY

GORE OPTIFADE CONCEALMENT

Traditional mimicry patterns based on human vision are designed to look like a specific type of vegetation or terrain. GORE OPTIFADE Concealment is the only scientifically proven concealment pattern based on animal vision to optically fade a hunter into their surroundings. By using advanced blends of micro and macro patterns to fool animal vision rather than mimic a particular shape, GORE OPTIFADE Concealment is more versatile and more effective at getting hunters close to game.

YKK ZIPPERS

Sitka Gear uses premium YKK Zippers across their product line for reliability, durability, weather resistance, and quiet operation. They also print many of their zippers with GORE OPTIFADE Concealment for added stealth.

Additional information

Color

Elevated II, Marsh, Timber
Size

3XL, Extra Large, Large, Medium, Small, XXL

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Frequently Asked Questions

Merino wool provides natural odor resistance that synthetic fabrics cannot replicate. On a multi-day hunt, that means fewer scent-detection events from downwind game. The 17.5-micron fiber in this half-zip is fine enough to be soft against the skin while retaining the thermal and moisture-management properties that make merino the standard for cold-weather static sits. Synthetics may dry faster, but they hold odor and provide less insulation when damp. For hunters who sit for hours in sub-freezing temperatures, merino is the material that performs when it matters.
Hunt Premium is an authorized dealer for every brand we carry. That means full manufacturer warranty support on your Sitka Gear purchase — no gray-market risk, no voided warranties. Our team hunts in the same conditions you do and can tell you honestly whether this heavyweight merino is the right weight for your November whitetail sits or if a midweight would serve you better. We stock what works, not what moves units.
The 290-gram heavyweight construction is designed specifically for static hunts in cold weather — tree stand sits, ground blinds, and spot-and-stalk pauses in sub-freezing temperatures. If you're hiking aggressively and generating body heat, the heavyweight may run too warm. For active pursuits in cooler conditions, Sitka's midweight merino would be the better choice. The half-zip ventilation helps moderate temperature on the hike in, but this layer is built for when you stop moving and need maximum insulation.
Gore Optifade Concealment is engineered around how animals actually see — not human vision. Even though this half-zip is worn under outer layers, the pattern on the merino face still breaks up your outline at the wrists, neck, and any exposed areas. More importantly, the 17.5-micron merino wool provides natural odor resistance that complements the visual concealment. Being unseen matters, but being unsmelled often matters more when game is close. This layer addresses both.
The Sitka Gear Merino Heavyweight Half-Zip comes in Elevated II, Marsh, and Timber — three Gore Optifade patterns matched to specific terrain types. Elevated II is designed for above-treeline and open-forest scenarios. Marsh is built for wetland and agricultural environments. Timber is optimized for wooded and brush-covered terrain. Choose the pattern that matches where you hunt most often. Sizes run from Small through 3XL.
Machine wash cold on a gentle cycle with a wool-specific detergent. Avoid fabric softeners — they coat the merino fibers and reduce odor resistance and moisture wicking. Hang dry or tumble dry on low heat. With proper care, the 290-gram merino blend in this half-zip will hold its shape and performance through multiple seasons of hard use. The nylon core-spun face adds durability that helps this layer outlast standard merino constructions.
SKU: 20-10074-EV-M Categories: , Brand:

The Hunt Premium Promise

Every product we carry is vetted for real-field performance. If it doesn't hold up when the temperature drops and the wait stretches on, it doesn't make the cut.

Authorized Dealer Full manufacturer warranty honored on every product — no gray market, no exceptions.
Free Shipping Ships free with signature confirmation on every order.
30-Day Returns Return within 30 days in original packaging for a full refund.

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About sitka gear Base Layers

sitka gear is a trusted manufacturer of premium base layers. HuntPremium is an authorized dealer offering the full sitka gear lineup with free delivery, price match guarantee, and expert support.

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