Here's what other sites are saying:
Polartec® Thermal Pro® polyester fleece has a high loft that traps warm air and breathes efficiently, keeping you warmer with less weight than other fleece. Added stretch helps the fabric fit smoothly and enhances your range of motion. Plus, you can compress it to the size of a water bottle, taking up less space in your pack than bulkier layers. Pieced with nylon for added durability. Lycra®-elastane-bound cuffs and hem comfortably lock in warmth. Imported. Machine wash and dry.
- L.L.Bean refers to the men's version