DOUBLE LAYER - Two layers of fabric connected back to back trap air between the layers for warmth without the weight. Midweight relaxed fit performance base layer. 100% Polyester, 150 GSM. ACCLIMATE DRY+ - It keeps you dry, warm, and comfortable with our exclusive Acclimate+ Dry technology enabled by hydrophobic yarns that move moisture away from your body. ODOR BLOCKING – Enhanced freshness and odor control– guaranteed for 20-30 washes. WARMTH FACTOR: WARMER - Ranked from Warm to Warmest, the Warmth Factor Thermometer tells you how warm each of our products is. Warmest Warmth Factors is considered Double Layer or Merino Wool Relaxed Fit. UPC 810065920508 ASIN B09DV2LZJG Color Black Pattern Solid Seasons All Fit Type Relaxed Fit character sports Back Style T Back Brand Name Polarmax Model Name Crewneck Neck Style Crew Neck Sport Type Multi-Sport Style Name Crewneck collartype collarless Fabric Type 100% Polyester Sleeve Type Short Sleeve Manufacturer Polarmax Style Number PM1101 Material Type Polyester, Wool Occasion Type Vacation Apparel Closure Type Pull On Age Range Description Adult Item Length Description Standard Length Manufacturer Part Number PM1101-BLK-L Product Care Instructions Machine Wash Apparel Occasion and Lifestyle Outdoor