Icebreaker 150 MerinoFine Ace Long Sleeve T-Shirt

Ultralight merino long sleeve tee that pulls double duty as a premium base layer and everyday performer.

The Icebreaker 150 MerinoFine Ace Long Sleeve T-Shirt is a lightweight performance top made from 100% ultrafine MerinoFine merino wool. Designed for high-intensity movement, it naturally regulates your temperature, breathes well, and resists odour whether you’re running, hiking, or travelling. The superfine 17.5-micron merino fibres feel noticeably softer than standard merino, giving a luxurious next-to-skin feel you can happily wear all day. Offset shoulder and side seams, flatlock stitching, and an underarm gusset improve comfort and mobility under packs, making this a go-to long sleeve for year-round missions and everyday wear.

• Ultrafine merino fabric – 150-weight MerinoFine knit uses 100% ultrafine merino for soft, itch-free comfort.
• Temperature regulating – Naturally helps keep you cool when you’re working hard and warm when you stop.
• Odour resistant – Merino fibres reduce smell, ideal for multi-day trips and repeated wears.
• Movement-ready cut – Offset shoulder seams, forward side seams, and underarm gusset boost comfort under a pack.
• Flatlock construction – Low-profile seams help minimise chafing during long runs or hikes.
• Everyday versatile – Clean long sleeve styling works as a technical base layer or a premium casual tee.