Halfdays Women's Baselayers

Frequently Asked Questions

• What are the material differences between the Fay/Hallie merino pieces, the Clare/Ruth bamboo styles, and the Johnson synthetic top?

  Fay and Hallie use merino wool blends for natural thermal regulation and anti-odor performance in a true midweight knit, while Clare and Ruth use bamboo viscose blends (marketed as “Merino Bamboo” blends in the line) for an ultra-soft, lightweight feel and high breathability. The Johnson is a synthetic blend with mesh underarms for targeted ventilation, fastest drying and highest abrasion resistance, and some Halfdays pieces also incorporate recycled synthetics for durability. All avoid cotton and prioritize moisture management for active use.
• How should I size Halfdays baselayers and what fit can I expect through 2X?

  Halfdays baselayers are designed snug and stretchy with athletic, form-fitting cuts—expect flattering compression, high armholes for mobility, and high-rise on leggings. The brand is size-inclusive up to 2X, but patterning can read roomier at larger sizes (you may notice different drape or strap flare on larger pieces), so check measurements and choose based on whether you want tighter compression or a bit more ease. If you’re between sizes, size selection depends on desired layering and compression rather than raw length alone.
• Which Halfdays pieces are best for cold alpine ski days versus high-output activities?

  For cold alpine days choose midweight merino items like the Fay Midweight Top or Hallie Midweight Leggings for extra insulation and odor control during lower-output periods. For high-output skiing, spring laps, or aerobic backcountry approaches opt for the Johnson synthetic top or the Clare/Ruth lightweight bamboo pieces for superior breathability and faster drying. Use midweight merino when you expect long cold exposure or slower activity, and lightweight bamboo/synthetics when you’ll be generating a lot of heat.
• How does the Fay Midweight Merino Top compare to the Johnson Top?

  The Fay Midweight Merino Top is a merino-based, midweight option focused on thermal regulation and anti-odor performance for colder conditions, while the Johnson Top is a slim, synthetic-blend layer with mesh underarms built for maximum ventilation and quick drying. Fay performs better for lower-intensity, cold-weather comfort; Johnson breathes more when you’re working hard or need rapid moisture transfer. Choose Fay for warmth and odor control, Johnson for high-output ventilation and a very close fit.
• What are the best care practices to keep Halfdays baselayers performing and to avoid shrinkage or pilling?

  Wash merino pieces on a gentle or wool cycle with a mild, wool-safe detergent and avoid hot water; reshape and lay flat to dry to limit shrinkage and preserve fit. Synthetics and bamboo viscose handle gentle machine washing similarly but also benefit from air drying or low-heat tumble to maintain elasticity and reduce pilling. Avoid fabric softeners and high-heat drying to preserve wicking, breathability, and compression characteristics.