Core Merino 330 Zip-Off BottomSitka GearSold by Sitka Gear

Sitka Gear

SITKA Core Merino 330 Zip-Off Bottom

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Heaviest-weight Merino

Wool blend for late-season backcountry

Merino Wool

Helps regulate temperature for comfort

Naturally Odor-resistant

Material helps minimize smell on

Armorspun Merino

Wool is reinforced for added

Recycled Synthetic

Lining moves sweat away from

$159.00
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SKU: 600153

Overview

Built for late-season hunts and extended backcountry trips, this heavyweight baselayer is designed to provide warmth when temperatures drop and comfort when you’re still covering ground. The merino wool blend is described as temperature-regulating and naturally odor-resistant, while the ArmorSpun construction adds durability for demanding use. A recycled synthetic lining is included to move sweat away from the skin, helping manage moisture during active periods. Side zips make it easier to shed the layer without removing boots, which is useful when weather and exertion levels change through the day.

Why Hunters Choose the Sitka Gear

Heavyweight Merino

Wool blend provides warmth for

Temperature-regulating Fabric

Helps maintain comfort during active

Naturally Odor-resistant

Merino wool supports extended trips

Armorspun Merino

Wool adds reinforced durability

Recycled Synthetic

Lining moves sweat away from

Key Features

  • Heaviest-weight merino wool blend for late-season backcountry hunts and cold-weather warmth.
  • Merino wool helps regulate temperature for comfort when you're active.
  • Naturally odor-resistant material helps minimize smell on extended trips.
  • ArmorSpun merino wool is reinforced for added durability.
  • Recycled synthetic lining moves sweat away from your skin to help keep you dry and warm.
  • Side zips let you remove the bottom without taking off your boots.

Best Used For

  • Late-season backcountry hunters needing heavyweight warmth in cold, demanding conditions
  • Extended expeditions where odor control and temperature regulation matter over multiple days
  • Hunters moving between glassing, hiking, and waiting who need moisture management
  • Users wanting easy layer removal with side zips without taking boots off

Specifications

Armor Spun Merino WoolYes
Merino Wool BlendYes
Odor ResistantYes
Recycled Synthetic LiningYes
Side ZipsYes

Pros

  • Heavyweight merino wool blend provides warmth for late-season backcountry hunts.
  • Temperature-regulating fabric helps maintain comfort during active movement.
  • Naturally odor-resistant merino wool supports extended trips.
  • ArmorSpun merino wool adds reinforced durability.
  • Recycled synthetic lining moves sweat away from skin to help keep you dry.
  • Side zips allow removal without taking boots off during changing conditions.

Considerations & Trade-offs

  • Heavier-weight merino construction is geared toward cold conditions, so it may be more warmth than needed for milder weather or high-output use.
  • The zip-off design adds convenience for layer changes, but it also introduces more hardware and potential bulk than a standard bottom.
  • This piece is built for long expeditions and changing conditions, which makes it versatile, but it is still a specialized baselayer rather than an all-season option.
  • The recycled synthetic lining is intended to move sweat away from the skin, but performance will still depend on how hard you're moving and how much layering you use.

Suggested Comparisons

  • Heavyweight merino baselayer bottoms
  • Zip-off baselayer pants
  • Late-season cold-weather hunting base layers
  • Merino wool hunting underwear

Suggested Accessories

  • Merino base layer top
  • Insulated hunting pants
  • Midweight baselayer bottoms
  • Hunting boots

Frequently Asked Questions

Is the Core Merino 330 Zip-Off Bottom intended for cold-weather hunts?

Yes. The product description says it is designed for late-season backcountry use and provides heavyweight warmth for the coldest hunts of the year.

What makes this baselayer different from a standard merino bottom?

It includes side zips so you can remove the bottom without taking your boots off. The description also notes ArmorSpun merino wool for added durability and a recycled synthetic lining to move sweat away from your skin.

Does it help with odor on extended trips?

The description says merino wool is naturally odor-resistant, which is intended to help minimize smell on extended trips.

Will it work well if conditions change during the hunt?

The product is described as regulating temperature to maintain comfort when you're on the move, and the side zips are meant to make layering changes easier in shifting weather conditions.

Can you confirm the exact fabric percentages or material breakdown?

No. The provided product data describes a heavyweight merino wool blend with ArmorSpun merino wool and a recycled synthetic lining, but it does not list exact material percentages.