FAQ

We work with natural fibres: cotton, silk, cashmere, and alpaca, alongside carefully chosen blends. Each material is chosen for how it feels, how it behaves in wear, and how it responds to care over time. You can read more about each material on the material pages, and specific fibre details are noted on each product page.

Wakayama Cloud Cotton is a fluffy cotton-blend fleece used for soft everyday pieces such as hoodies, sweaters, and sweatpants. The blend is 97% cotton and 3% polyurethane, with the small amount of polyurethane added for recovery. Wakayama refers to the knitting location, not where the cotton is grown. Product-specific details are noted on each product page.

We select natural fibres with attention to surface quality and yarn specification. Some customers with sensitive skin find natural fibres more comfortable than synthetic alternatives, though individual responses vary. If you have a known fibre sensitivity or allergy, we recommend checking the fibre content on the product page before purchasing. We do not use the term “hypoallergenic” for any of our products.

Some products use a small percentage of synthetic fibre — typically for structural purposes such as elastane in socks, polyurethane for recovery in cotton-blend fleece, or a stabilising blend in knitwear. Fibre content is listed on each product page and on the care label. If you are looking for a specific fibre composition, the product page is the most reliable source.

It means the primary fibre in each garment comes from a natural source — plant or animal — rather than a petroleum-based synthetic. Some pieces are blends that include a small amount of synthetic fibre for a specific function, which is always noted on the product page. Natural fibres have different care requirements and different properties in wear than synthetic fibres.

Pilling is a natural behaviour of many fibres, particularly fine protein fibres such as cashmere and alpaca. It occurs when short fibres work their way to the surface and form small balls. It is not a sign of poor quality. The degree to which a fabric pills depends on the fibre, the yarn construction, and how the garment is worn and washed. Care guidance on each product page notes where pilling is a relevant consideration.

Each product page includes a size guide with measurements. We recommend measuring yourself and comparing against the garment measurements rather than relying on your usual size in other brands, as fit varies by garment type and construction. The size guide is also available at size guide.

Fit varies by garment. Each product page notes the fit — whether a piece is cut close, relaxed, or oversized — and includes the measurements of the model and the size they are wearing where available. We recommend reading the fit notes on the product page before ordering.

The product page fit notes will usually indicate whether a garment runs small or large, and whether sizing up or down is advisable for a particular fit. If you are unsure, contact us at hello@mercer-st.com and we will help where we can.

The Mercer St. cotton socks are available in two sizes: S/M (22–24.5 cm foot length) and M/L (25–27 cm foot length). Measure your foot length and refer to the size guide on the product page.

Care instructions vary by garment and fibre. The care label on each garment is the authoritative source. Product pages also include specific care guidance. As a general principle: natural fibres respond better to gentle washing at low temperatures, and most fine-knit garments should be laid flat to dry rather than hung or tumble-dried. Always follow the care label.

Some fine-knit garments can be machine washed on a wool or delicate cycle at a low temperature with a gentle detergent. Others should be hand washed only. The care label on each garment specifies the correct method. Do not machine wash a garment that the care label specifies as hand wash only.

Fold rather than hang. Hanging a fine-knit garment can cause it to stretch over time. Store in a cool, dry place. For longer-term storage, a breathable bag or box helps protect against dust and moths. Protein fibres — cashmere, alpaca — can be affected by moths; cedar or lavender can be used as a natural deterrent.

Pilling is normal and can be managed. A cashmere comb or fabric shaver can be used to remove pills without damaging the fabric. Use gentle strokes on a flat surface.

Ironing guidance is noted on the care label. Many fine-knit and jersey garments respond better to steaming than direct ironing. If ironing is appropriate, use a low temperature and a pressing cloth between the iron and the fabric. Always follow the care label.

Shipping details are being finalised. Final options and costs will be shown at checkout. For questions, please contact hello@mercer-st.com.

Delivery timeframes vary by destination and will be shown at checkout. For questions about your region, please contact hello@mercer-st.com.

Each order ships to one address. If you need to send to multiple addresses, please place separate orders.

For return or exchange enquiries, please contact hello@mercer-st.com. Full return policy details will be published here.

If your order arrives damaged or you receive the wrong item, please contact us at hello@mercer-st.com with your order number and a photograph of the issue. We will resolve it promptly.

We process orders promptly. If you need to change or cancel an order, contact us at hello@mercer-st.com as soon as possible with your order number. We cannot guarantee changes or cancellations once an order has been dispatched.

Check your spam or junk folder first. If the confirmation is not there, contact us at hello@mercer-st.com with the email address you used at checkout and we will confirm your order status.

Production details are noted on each product page. We do not make a blanket claim about production location across the entire range.

When a product page notes that a piece is made in Japan, it means the garment was substantially manufactured in Japan. It is a production location, not a quality certification. We note production details on individual product pages only where we have confirmed the information. We do not use “Made in Japan” as a site-wide claim.

Where possible, we work closely with the people and suppliers who understand the material and the production process. We do not make specific claims about supply chain structure on individual products without confirmation.

By email: hello@mercer-st.com. We aim to respond within two business days.

We aim to respond to all enquiries within two business days.

Send us an email at hello@mercer-st.com with the product name and your question. We will do our best to help.