
Mens Casper Heat Boost Heavyweight Hunting Base Layer Shirt - Dark Gray
9604-DG - Casper Base Layer Shirt
An ultimate cold weather garment, the Matterhorn's fully lined Heat Boost sherpa fleece captures all the warmth you need for late season hunts, with none of the bulk you expect. The graphene yarn knitted into the sherpa has the incredible thermal conductivity, moisture wicking, and antimicrobial capabilities inherent to graphene. The graphene harnesses your body’s energy, absorbs the heat, and releases it back onto your body. This literally surrounds your core, back, and arms in a lasting, radiant warmth. The Heat Boost graphene technology super charges the sherpa's warmth without added heft. A 100% windproof and waterproof construction means the cold air is blocked out, and the warm air locked in. The features of a zip-off hood, chest handwarmer pockets, and harness access port mean you can hunt your way this season - whether in a blind, stand, or saddle. Recommmended temperature range of -10F to 20F, with proper layering. The Matterhorn - When being cold isn't an option.
Features Comparison |
Matterhorn 9638 |
Fairbanks 9443 |
Warren 9997 |
Saskatoon 9542 |
Houlton 9189 |
Lining | Heat Boost Sherpa | Regular Sherpa |
Heat Boost Sherpa with Merino Wool Blend | Heat Boost Sherpa | Regular Sherpa |
Windproof | ✔ | ✔ | ✔ | ✔ | ✔ |
Waterproof | ✔ | ✔ | |||
DWR | ✔ | ✔ | ✔ | ||
Under arm venting zipper |
✔ | ||||
Chest Hand Warmer Pocket |
✔ | ✔ | ✔ | ✔ | |
Harness Access Port | ✔ | ✔ | ✔ | ✔ | ✔ |
Lined or Bonded | Lined | Lined | Bonded | Bonded | Bonded |
Insulation | 60g Polyfil in Body only |
100g Polyfil in Body and Sleeves |
None | None | None |
Hood | Zip-Off | Zip-Off | Zip-Off | No Hood | No Hood |
Front Zipper | 2-Way Zipper |
2-Way Zipper |
Regular Zipper |
Regular Zipper |
Regular Zipper |
Storage Pockets | 4 exterior, 3 interior |
3 exterior, 1 interior |
3 exterior, 2 interior |
3 exterior, 2 interior |
4 exterior, 2 interior |
Garment Weight Size XL |
?? lbs | 3.4lbs | ?? lbs | 2.3 lbs | 2.0 lbs |
Temperature Range | -10°F to 20°F layering as needed |
0°F to 30°F layering as needed |
15°F to 35°F layering as needed |
25°F to 45°F layering as needed |
25°F to 45°F layering as needed |
Available Camo | VTK | DC TRN VTK |
DC TRN VTK |
DC TRN VTK |
DC |
The Casper heavyweight hunting base layer shirt combines the power of Heat Boost™ graphene technology with a super cozy soft hand feel to provide all day warmth. It is designed for cold temperatures to help you outlast the cold and stay out longer.
The graphene yarn knitted into the knit jersey has the thermal conductivity, moisture wicking, and antimicrobial capabilities inherent to graphene. The graphene harnesses your body’s energy, absorbs the heat and releases it back, surrounding you in a lasting radiant warmth. The Heat Boost graphene technology super charges the warmth without added weight - making this the warmest, lightest base layer you'll ever wear.
The wicking and quick drying nature of the fabric helps draw moisture away from your skin and keep you dry as you move about. Inner thumb straps on the cuff inside make it easy to slip your arms into another layer.
The ultimate in warmth this Heat Boost layer shirt works in broad range of weather conditions and activity levels.

Features:
- Shell material: 4-way stretch Heat Boost™ Jersey, knapped with a cozy hand feel, 250gsm (92% Polyester/8% Spandex)
- Heat Boost™ graphene technology: A line of enhanced fabric super charged with graphene's thermal conductivity, moisture wicking, and antimicrobial properties
- Fit: Form fit
- Sleeves: Armpit gusset
- Cuffs: Thumb strips on cuff interior
- Feature: High heat to weight ratio.
- Seams: Non-chaffing flatlock seams
- Neck: Tag free collar
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