| The Snowflakes on each style of underwear help you determine your needs. The Kenyon Snowflake Rating system has been devised to simplify your selection of thermals. | |||
| Lightweight | Medium Weight | Expedition Weight | |
| Thermal | Polypropylene Rib Silkyester Poly-Lite Rib Outlast® Rib |
Poly/Wool/Polypro
Kenyon BiComponent Outlast® BiComponent Everywear Merino Wool Eco-Thermals |
Power Stretch Fleece Polarskins Fleece |
| Rating | ![]() |
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| Recommended Usage |
Moderate weather with little activity; continuous activity in cold weather | Moderate to cold weather with some activity; cold weather when you alternate between activity and rest. | Sub-freezing temperatures at any level of activity. |
| Applied Sports & Activities |
Cross Country Skiing, Running, Hiking, Cycling. | Walking, Standing, Skiing, Snow Boarding, and Ice Skating on extremely cold days. | Winter Camping, Climbing, and Hunting |