The Women's Tree Wool Firstlayer Longsleeve from Mammut is a functional shirt specifically designed for mountain sports adventures. It combines soft merino wool with lyocell to ensure both comfort and functionality. This long-sleeve shirt offers excellent thermal insulation while remaining breathable, making it ideal for changeable weather conditions. The material composition ensures that the shirt dries quickly and feels pleasant against the skin. With a regular fit, it provides freedom of movement and is suitable for both athletic activities and everyday wear. The use of natural fibers makes it an eco-friendly choice for environmentally conscious athletes.
| Clothing size | XS | 
| Sleeve length | Long sleeves | 
| Material composition | 50% Lyocell, Main material: 50% wool | 
| Target group | Women | 
| Item number | 55627977 | 
| Manufacturer | Mammut | 
| Category | Functional undershirts | 
| Manufacturer no. | 1016-01700-5784-112 | 
| Release date | 5.3.2025 | 
| Colour | Blue | 
| Exact colour description | Marine Melange | 
| Upper | Merino wool | 
| Material composition | 50% Lyocell, Main material: 50% wool | 
| Target group | Women | 
| Age group | Adults | 
| Clothing size | XS | 
| Sleeve length | Long sleeves | 
| Sport | Hiking, Mountaineering, Ski tours | 
| Season | All-season | 
| Fabric properties | Breathable, Quick drying, Temperature regulating | 
| Fit | Regular fit | 
| Pattern | Mottled | 
| Country of origin | Vietnam | 
| Manufacturer commitment | Fair wear, RE100, SBTi | 
| Manufacturer compensation | According to RE100, the manufacturer Mammut fully compensates for its energy consumption, leading to a reduction in emissions. | 
| CO₂-Emission | |
| Climate contribution | 
| Multipack | Single pack | 
| Weight | 125 g | 
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