Can you machine wash merino wool?

Yes, most modern merino wool garments are designed to be machine washable, which is one of the advantages merino has over traditional wool. The key is to use the right settings. Select a wool or delicate cycle with cold water and choose a gentle, wool-safe detergent. Avoid regular laundry detergent, as it can be too alkaline and strip the natural oils from merino fibers. Place the garment in a mesh laundry bag to reduce friction against other items in the load.

A few precautions will prevent common problems. Never use hot water, as this is the primary cause of felting and shrinkage in wool. Skip the fabric softener, which coats fibers and reduces merino's natural breathability and moisture management. Use a low spin speed or skip the spin cycle entirely if your machine allows it, as aggressive spinning can distort the fabric.

After washing, reshape the garment gently and lay it flat to dry on a clean towel. Do not hang merino wool while wet, as the water weight will stretch the fabric. Most merino activewear brands, including Icebreaker and Reprise Activewear, specifically engineer their garments for machine washability and include detailed care tags. Following these instructions will keep your merino performing at its best for years.