Grid Fleece: Warmth and Breathability in One Structure
Grid fleece uses a three-dimensional pattern of raised squares to trap warmth while open channels let moisture escape.
The practical guidance below is written for buyers and product developers who need a specification that a mill can meet.
How the grid structure works
Raised areas touch the skin and trap air, while recessed channels move moisture and vapour away.
It is one of the few areas where a modest investment in development removes a large volume of after-sales work.
Thermal efficiency
Warmth per unit weight is better than standard brushed fleece, which matters in layering systems.
Agree the tolerance in writing before sampling, since tolerance disputes are far more common than outright failures.
- Confirm the numeric range and the test method in the specification
- Keep an approved physical standard at the machine
- Retest after the agreed care regime before shipping
Typical specification
180 to 280 GSM with 8 to 15 percent elastane for stretch, in polyester or polyester-wool blends.
In production, consistency matters more than the best single result, because batch-to-batch variation is what customers notice.
Production control
Brushing depth and pattern registration must be consistent, or the grid flattens and performance drops.
Repeat the test when the fabric, the mill or the finishing route changes, as previous results no longer apply.
- Request test reports on production fabric, not on development samples
- Verify the sampling plan and the number of specimens
- Store reports with roll or lot identification for traceability
Testing for quality
Assess thermal resistance, air permeability, pilling and appearance after laundering.
Ask for the cost of the requirement to be shown separately, so it can be weighed against the benefit it delivers.
Summary
Used as a checklist in development and again before shipment, the points above prevent the most common and most expensive failures.
