What Makes a Simple Garment Worth More?
May 22, 2026 — Mercer St.
Two T-shirts. Same silhouette. Both white. Both 100% cotton. One costs ¥1,500. One costs ¥20,000. The price difference is real — but is it justified? And if so, by what, exactly?
This note works through the chain of decisions that separate a basic cotton T-shirt from a more considered one — not to justify any particular price, but to make the variables visible so you can evaluate them yourself.
In this note
- Where the cost goes in a garment — fibre, yarn, fabric, construction, finishing
- What “cost per wear” actually means
- What you are not paying for in a cheaper garment
- What you are sometimes paying for that does not affect the garment
- How to evaluate whether a higher price is justified
Where the cost goes
Fibre
The raw material is the foundation. Cotton ranges from commodity-grade short-staple (inexpensive, widely grown) to extra-long staple varieties (Pima, Giza) that command a premium because they are rarer and can be spun into finer, smoother yarn. Cashmere costs more than wool because a cashmere goat yields 150–200 grams of usable fibre per year, compared to several kilograms from a wool sheep. Alpaca, silk, and fine wool each have their own supply constraints that drive the raw material cost.
A higher raw material cost does not automatically produce a better garment — but it does mean a finer starting point. A garment made from extra-long staple cotton is starting from a better position than one made from standard cotton, all else being equal.
Yarn
How the fibre is spun into yarn affects the final fabric significantly. Combing (removing short fibres before spinning) produces a more even yarn with a smoother surface. Finer yarn counts (higher Ne or lower tex numbers) allow for finer gauge knitting and a cleaner fabric surface. Higher twist can produce a more stable yarn that maintains its character longer. These steps add cost at the yarn stage — and they are invisible on the finished garment label.
Fabric construction
The knit structure, gauge, and machine type all affect the character and cost of the finished fabric. Interlock construction uses more yarn per unit area than jersey. Fine-gauge knitting requires more needles and slower production. Loop-wheel knitting in Wakayama runs at one-twentieth the speed of modern circular machines. These are real cost inputs that do not appear on a label.
Finishing
Finishing — washing, softening, singeing, specialist surface treatments — adds cost and significantly affects how a fabric feels and behaves over time. The Japanese rose petal finishing used on the Materica interlock T-shirt is a specialist process that requires additional steps after knitting. It is part of why the fabric feels the way it does — and why the surface character is designed to last rather than diminish after washing.
Construction and make
How a garment is cut, sewn, and finished affects how it holds its shape and how long it lasts. Flatlock seams lie flat against the skin and do not cause pressure points. Reinforced stress points (shoulder seams, side seams) determine how the garment holds up over time. A garment sewn quickly at high volume will have different construction quality than one made at lower volume with more attention per unit. The cost of skilled labour and slower production is real.
Scale and margin
Volume changes cost per unit significantly. A brand producing 10,000 units of a T-shirt in a large factory has a different cost structure than one producing 500 units in a specialist facility. Higher-volume production is cheaper per unit — but it also means the brand may be choosing volume over specificity of material and construction. Neither is inherently better; they reflect different priorities.
Mercer Note
A higher price does not guarantee a better garment. Brand margin, marketing spend, packaging, and retail markup are all real costs that can inflate a price without improving the garment itself. The question to ask is not “why is this expensive?” but “what specifically is the cost paying for?”
Cost per wear
Cost per wear is a simple concept: divide the price of a garment by the number of times you wear it. A ¥20,000 T-shirt worn 200 times costs ¥100 per wear. A ¥1,500 T-shirt worn 10 times before it deteriorates costs ¥150 per wear — and goes to landfill faster.
This framing only holds if the more expensive garment actually wears better over time. If a higher-priced garment loses its surface character after 20 washes, the cost-per-wear calculation collapses. The durability claim has to be earned, not assumed.
The question is not the price. It is what the price is paying for — and whether that translates to how the garment behaves over time.
What you are not paying for in a cheaper garment
- Fibre selection beyond commodity grade
- Yarn spinning beyond standard count and twist
- Fabric construction beyond standard gauge and structure
- Finishing beyond standard wash and dry
- Slower production with more attention per unit
- Testing and sampling to confirm the fabric behaves as intended
None of this means cheap garments are bad. For many purposes — a T-shirt for gardening, a pair of socks for gym use — commodity-grade production is entirely appropriate. The question is whether the purpose of the garment matches the production.
What you are sometimes paying for that does not help
- Brand premium (the cost of the logo, not the garment)
- Retail markup in high-rent locations
- Marketing and advertising cost embedded in the price
- Packaging and presentation
- Supply chain opacity that makes verification difficult
A high price does not indicate transparency about production. Some expensive brands have less specific production information than less expensive ones. Ask what is being described, not just what is being claimed.
How to evaluate whether a price is justified
- Is the fibre composition and specification stated clearly?
- Is the production location and method described?
- Is the knit structure identified?
- Is the finishing process described?
- Are care instructions specific and honest?
- Does handling the garment confirm the material claims?
If none of these questions can be answered from the product page, the price is asking for trust without providing the basis for it.
What this means for Mercer St.
Mercer St. prices reflect the specific fibre, yarn, fabric construction, and finishing decisions made for each piece — not brand premium or retail markup. Each product page describes the material specification and production details that account for the cost. Where a detail is not yet confirmed with the supplier, this is noted on the page rather than stated as fact.
We do not claim our prices are low. We claim they are honest about what they are paying for.