Offering long-lasting warmth in all conditions, the Icebreaker 200 OASIS SONEBULA W is a long-sleeve, stand-up collar undergarment for women that forms a royal first layer.

Made of the most versatile, easy-to-layer Merino jersey material, this piece is a perfect insulator and breathable layer. The soft merino wool composition helps regulate body temperature in all weathers and resists odors.

In addition to its high collar for extra warmth around the neck, this model is not lacking in mobility with its gussets at the armpits.