The Smartwool Outdoor Merino Base Layer Crew Women’s Thermal Top is a premium, high-performance garment engineered to keep you comfortable during demanding backcountry adventures, multi-day treks, or casual morning runs. Crafted from an innovative wool/synthetic blend, this versatile piece combines Merino wool with COOLMAX EcoMade technology, harnessing the natural thermal properties of sustainably sourced wool alongside the rapid moisture-wicking power of recycled synthetic fibres. Designed to offer exceptional breathability and superior temperature regulation, it efficiently manages your microclimate by trapping warmth when the temperature drops and cooling you down during high-exertion activities across all seasons. The inherent odour resistance of Merino wool ensures you stay fresh over consecutive days of wear, making it an indispensable asset for minimalist packers. Furthermore, the integration of synthetic fibres injects remarkable durability into the fabric, allowing it to withstand the friction of heavy backpack straps and frequent washing without losing its shape.

Featuring a tailored slim fit, this thermal top moves seamlessly with your body, minimising bulk so you can layer it effortlessly beneath a fleece or technical shell. The anatomical construction incorporates raglan sleeves, which eliminate traditional shoulder seams to prevent chafing under pack harnesses while vastly improving your overall range of motion. Every seam is engineered with flat merrow stretch stitching, enhancing next-to-skin comfort and ensuring the garment stretches fluidly with your every movement.

Whether you are scaling alpine peaks, setting up camp in chilly conditions, or seeking a reliable everyday layering piece, this crew top delivers the ultimate balance of comfort, strength, and climate control.

Key Features:

  • Wool/Synthetic Blend Composition: Integrates 50% Merino wool and 50% COOLMAX EcoMade to deliver the moisture-managing advantages of both natural and recycled synthetic textiles.
  • Performance Across All Seasons: Carefully balanced fabric weight provides optimal insulation and airflow, making it ideal for year-round outdoor exploration.
  • Advanced Temperature Regulation: Dynamically adapts to your body's physical output, providing reliable warmth in freezing weather while preventing overheating during intense movement.
  • High Breathability: Accelerates vapour transfer and moisture dispersal away from the skin, ensuring you remain dry and comfortable when working up a sweat.
  • Natural Odour Resistance: Utilises the antimicrobial properties of Merino wool to repel unwanted smells, keeping the garment fresh for longer periods between washes.
  • Enhanced Durability: Engineered to handle the rigorous demands of rugged outdoor environments, offering superior resistance to wear, abrasion, and tearing.
  • Sleek slim fit profile: Hugs the contours of the body closely to maximise thermal efficiency and facilitate smooth, bulk-free layering.
  • Chafe-Free Raglan Sleeves: Diagonal sleeve seams remove pressure points directly off the tops of the shoulders, radically boosting comfort when carrying heavy loads.
  • Flexible merrow stretch stitching: Low-profile, ultra-strong seams expand with the fabric to ensure uninhibited flexibility and a smooth next-to-skin feel.

Yes, with its stylish cut, it can be worn for casual daily wear as well was outdoor activities.

Yes, they should fit snugly like second skin without restriction of movement. A close fit is necessary for the moisture-wicking property to work efficiently and provide temperature regulation.

If washed properly, it should retain its shape and size. Air dry them flat on a clean towel, or select the lowest heat and tumble dry settings. It is advisable to avoid extreme heat and harsh agitation to the prevent the wool fibres from felting. Fabric softeners and bleach may also permanently damage the wool fibres.

Brand : Smartwool

SKU: SMWL-SW003089

Model # : SW003089

Gender : Womens

Clothing Type : Tops

Sleeve Length : Long

Materials : 50% Merino Wool |50% COOLMAX EcoMade Recycled Polyester

Free shipping on orders over $140 to Australia & NZ*
Shipping on small orders (under $140) only $9.95
Express shipping to Australia & NZ only $15

Standard Shipping (AU/NZ) – FREE on orders over $140 and $9.95 on orders under $140. Orders are dispatched within 1 business day. Click here for shipping delivery times

Select ‘Standard Shipping – Auspost Only’ if you would prefer your parcel is sent with Auspost. Otherwise it will be shipped with any of our available carriers. Auspost Only shipping is not available on some very heavy/bulky orders.

Express Shipping (AU/NZ) – Need it faster? Express Shipping is available for $15. Express Shipping is not available on heavy/bulky orders. Orders placed before midday on business days are usually dispatched same day (otherwise within 1 business day). Delivery times in the table below.

Click and Collect – Shop online and collect in our Milton, Brisbane store, free for all orders. Orders are usually ready within 2 hours (during opening hours). Click here for address and opening hours.

Terms and conditions apply, click here for a full overview of our shipping policies

  • If you have selected the wrong product/size for you, or want to exchange/return for any reason except for warranty or our error, this is referred to as a 'change of mind' return.
  • Not all products are eligible for change of mind returns (click here for excluded products). Final Clearance products are not eligible for change of mind returns.
  • Once you submit a Return Request, we will provide return instructions via email (along with a prepaid return label if applicable). Please wait to receive this before returning any items (Try 2 Anything excluded)
  • Change of mind returns can be resolved by your choice of exchange, full store credit, or a refund. Refunds are subject to a $19.95 admin fee.

For a full overview of our returns and warranty policies, see Returns and Warranties

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