The icebreaker Merino Women’s 200 Oasis Long Sleeve Crewe is the benchmark by which all other thermal base layers are measured. As Icebreaker's most versatile and best-selling active top, it is engineered to be the foundation of your layering system across all four seasons. Crafted from 100% pure Merino wool in a lightweight 200 g/m² weave, it functions flawlessly as a next-to-skin layer for alpine skiing, technical trekking, or breezy morning jogs, delivering incredible thermal regulation and a soft, non-itch feel.

Specifications

• Item Number: #1043750

• Material: 100% Merino Wool

• Fabric Weight: 200 g/m² (Lightweight / Highly versatile)

• Fit: Slim / Next-to-skin silhouette

• Features: Flatlock seams, off-set shoulder stitching, underarm gussets, drop-tail hem, classic crewe neck.

Key Technical Features

• 100% Pure Merino Wool (200 g/m² Lightweight): Icebreaker’s signature jersey knit balances low-bulk weight with high-efficiency temperature regulation, keeping you warm when it’s chilly and breathing freely when your heart rate climbs.

• Underarm Gussets for Mobility: Features specialized underarm panels that provide absolute freedom of movement, ensuring the hem doesn't pull out of your pants during high-reaching climbs or ski poles extensions.

• Off-set Shoulder Seams: The stitching is moved away from the crest of the shoulders, completely eliminating pressure points and chafing under heavy backpack straps or running vests.

• Flatlock Construction Throughout: Every single seam is flat-stitched to sit flush against the skin, guaranteeing an irritation-free experience during high-movement activities.

• Drop-Tail Hem: Cut with a slightly longer back panel to provide extra coverage and lock out cold drafts when bending, stretching, or sitting.

Care Instructions

• Washing: Machine wash cold or warm inside-out on a regular gentle cycle with similar colors.

• Detergent: Use a mild liquid detergent. Strictly avoid fabric softeners and bleach; these coat the natural wool fibers, permanently destroying their breathability, temperature regulation, and moisture-wicking capabilities.

• Drying: Line dry in the shade. Do not tumble dry, as high heat will cause pure Merino wool to shrink significantly.

• Storage: Make sure the top is completely dry before storing it flat in a drawer. Keep it in a sealed cedar chest or moth-protected area to preserve the premium natural fibers.

Professional Tips from X-Boundaries

1. The Perfect Travel Companion: If you're traveling from tropical Singapore to a colder climate, pack this top in your carry-on. Its lightweight profile keeps you cozy during over-chilled flights, and it transitions smoothly into an outdoor base layer once you touch down.

2. Naturally Odor-Resistant: Because premium Merino wool is inherently antimicrobial, it chemically repels odor-causing bacteria. You can wear this top for days on end without a wash, making it an incredible space-saver for multi-day trekking or minimalist packing.

3. The 3-Layer Synergy: For optimal outdoor comfort, pair this next-to-skin Oasis top with a insulating fleece mid-layer (like a Montbell jacket) and top it off with a windproof/waterproof shell. It forms an unbeatable microclimate around your torso.

4. No Prickle, All Comfort: Unlike rough traditional wool that irritates the skin, the ultra-fine Merino fibers used in the Oasis series bend naturally when in contact with your skin, ensuring zero itchiness.