Where to Buy
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Here's what other sites are saying:
The REI heavyweight MTS underwear crew is an excellent first layer for mountaineering and other high-energy, cold-weather activities. Quick-drying and moisture-wicking, ultrasoft MTS microfleece draws perspiration away from skin to keep you warm, dry and comfortable. Droptail hem stays tucked in and offers extra coverage in back. All seams are flatlock stitched to avoid abrasion and bulk. Close-fitting cut increases top's thermal efficiency. Fabric provides UPF 50+ sun protection, shielding skin from harmful ultraviolet rays. Closeout.
REI Heavyweight Crew Long Underwear Top
REI Heavyweight MTS Zip-T
REI Heavyweight Crew Shirt
REI Heavyweight Polartec Power Dry Crew
Icebreaker Everyday Long Sleeve Crewe
$40 - $70
Smartwool Midweight Zip T
$46 - $99
Patagonia Capilene 4 Expedition Weight Zip-Neck
Arc'teryx Rho LT Zip Neck
$40 - $125