They are designed for cold to very cold temperatures. We now have an expedition weight 100% merino wool thermal available. You can find it by clicking here: Women's Expedition Weight Thermal Top 807BLK if you are looking for the heaviest weight 100% merino wool crew neck top available. Merino wool is the choice of all avid outdoor enthusiasts. Merino wool is super soft and does not itch like traditional wool because merino sheep wool is much finer and thinner than regular wool.
• 100% 18.5 Micron Merino Wool
• 230 g/m2 Interlock Knit Construction
• Flat lock seams to prevent chafing
• Machine washable and machine dryable
• Women’s Sizes SM to XXL
• Garment Weight in Size Large = Coming Soon
• Style #804
• Imported
• Color: Black
| Size | Small | Medium | Large | XL | 2X |
| USA Size | 4 to 6 | 8 to 10 | 12 to 14 | 16 to 18 | 20 to 22 |