Thermal Base Layers AW Collection Planning Guide for Start-Up Brands: 2026 Guide No.46

Every season the thermal base layers category in South Korea moves a little earlier, and the buyers who secure capacity in advance keep their margins intact. This guide for Start-Up Brands sets out what to check, what to ask and what to document before you place an order.

Compliance, Testing and Sustainability

Animal-derived fill and trims need documentation, and buyers should keep it on file for the season. Ask for social compliance documentation such as a BSCI, Sedex or WRAP audit dated within the last twelve months. Chemical and packaging rules differ by market, so confirm the destination requirements before you finalise the packing spec. Request test reports for restricted substances, colour fastness and, where relevant, flammability.

Inspection Points Buyers Should Book

Measure a full size set against the graded spec sheet, and record every deviation, however small. Insist on a pre-shipment inspection against an AQL plan, with the report sent to you before the goods leave. The critical test for thermal base layers is wicking rate and colour fastness, and it should be run on the production batch, not on a golden sample. Book an in-line inspection at 30 percent completion: that is the cheapest moment to fix a problem.

Lead Time and Order Planning

Confirm the trims and the labels before production starts, since late trims delay the whole line, not just your order. Split large programmes into two or three deliveries so that early stores are fed and later stores are not overstocked. Build a buffer of seven to ten days between the ex-factory date and the sailing date for the unexpected. Book capacity in advance for peak months; a factory that is full in September cannot rescue a late October order.

Reading the Season and the Market

Peak demand for thermal base layers runs from October through February, so the buying window closes earlier than most new buyers expect. Cold-weather categories sell on trust, and thermal base layers are no exception: a single batch that underperforms can cost a whole retailer relationship. The strongest thermal base layers programmes share one habit: they are planned against a calendar rather than against a departure date. South Korea is a demanding market for thermal base layers because buyers there compare weight, warmth and price in the same conversation.

Materials and Construction

The brushed polyamide-elastane knit determines most of the comfort and durability, and it is the first item to write into the specification. A good thermal base layer starts with the brushed polyamide-elastane knit, so agree the material grade before you discuss price. The performance buyers pay for is moisture management and stretch, and it comes from the brushed polyamide-elastane knit combined with careful make-up. Specify gram weight, composition and shrinkage tolerance in numbers, not adjectives. For thermal base layers, the construction matters as much as the fabric: watch the flatlock seams and gusset.

Getting the Goods to Market Intact

Retail-ready packing removes a handling step at destination and reduces damage claims. For a seasonal category, hold a small air-freight allowance back for the fastest-selling colourways. Label every carton with the PO number, size, colour and quantity so that receiving is quick and accurate. Plan the sailing, not the shipping date: the production calendar should work backwards from the arrival window.

Five Boxes to Tick Before You Order

If you sign the specification, seal the sample, book the inspection, confirm the packing and file the documents, the order takes care of itself.