REI Heavyweight MTS Long-Sleeve Crew
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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.