How to Care for Merino Base Layers

By Le Col | Published: 2026-10-30

Category: Tips & Care

Learn the best way to wash and dry your merino base layer to keep it soft, stretchy, and odour-free for years.

Quick answer

To keep your merino base layer soft, stretchy, and odour-resistant, wash it on a cold, gentle cycle with a wool-friendly detergent and lay it flat to dry.

Why merino needs special care

Merino wool is naturally temperature-regulating and odour-resistant, but it's also more delicate than synthetic fabrics. Harsh detergents, high heat, and aggressive washing can damage the fibres, leading to pilling, shrinkage, or loss of softness. The added synthetic fibres in blends like the Le Col Women's ARC Merino Short Sleeve Base Layer improve stretch and durability, but the wool still needs gentle handling to last.

When to wash vs. air out

Merino doesn't need washing after every ride. Because it's naturally antimicrobial, you can often hang it to air out between wears. Wash it only when it's visibly soiled or starts to smell—this reduces wear and saves water.

How to wash and dry your merino base layer

Turn inside out and fasten any closures: Turn the base layer inside out to protect the outer surface. Zip any zippers or fasten any snaps to prevent snagging. This step reduces friction on the fabric's face and keeps it looking new longer.
Wash on a cold, gentle cycle with wool detergent: Use a dedicated wool or delicates detergent. Set your machine to a cold (below 30°C / 86°F) gentle or hand-wash cycle. Never use fabric softener or bleach—they coat the fibres and reduce breathability. A common mistake is using regular detergent; it can strip merino's natural oils and cause stiffness.
Skip the spin cycle: When the wash finishes, remove the base layer immediately. Do not let it sit wet. Gently squeeze out excess water—do not wring or twist. High spin speeds can felt and shrink merino. A gentle squeeze is all you need.
Lay flat to dry away from heat and sunlight: Place the base layer on a clean towel or a drying rack in a well-ventilated area away from direct sunlight, radiators, or tumble dryers. Reshape it while damp. Hanging merino can stretch it out of shape. Always lay flat.
Store folded, not hung: Once completely dry, fold the base layer and store it in a drawer or shelf. Avoid hanging on a hanger for long periods, as the weight can stretch the shoulders. Folding preserves the fabric's structure and prevents permanent creases.

Product facts

Womens ARC Merino Short Sleeve Base Layer: The Le Col Women's ARC Merino Short Sleeve Base Layer uses a premium merino blend from Italy’s Biella region, with added synthetic fibres for stretch and durability. The synthetic fibres help the base layer keep its shape through repeated gentle washes, but the merino still requires a wool-friendly detergent and cool water to stay soft.
Womens ARC Merino Short Sleeve Base Layer