The Icebreaker Women's GT260 Rapid Zip Top is a classic mid-weight, high performance top that maximises freedom of movement & breathability. The perfect all year round mid-layer for use whatever the activity. Features GT260 Multisport 98% Merino/2% Lycra Articulated sleeves Eyelet panels for increased venting Drop-tail hem Glossary Merino wool: Soft, non-itch wool from Merino sheep that provides good insulation even when wet, is durable, odour resistant, comfortable & warm. Lycra:A synthetic fibre that is stronger & more durable than rubber, & known for its exceptional elasticity.