Developed for Base Layers, this Interlock Knit answers the most common brief we receive: next-to-skin comfort with continuous moisture movement. The yarn package is nylon spandex with copper bearing filament, chosen because it provides antibacterial action plus faster heat transfer away from the skin, and the finished cloth is set and tested so that UPF 50+ Sun Protection.
Nylon Spandex Copper Ion Filament 270 GSM Interlock Knit, face view
Key specifications
| Parameter | Value |
|---|---|
| Fabric name | Nylon Spandex Copper Ion Filament UPF 50+ Sun Protection Interlock Knit |
| Composition | nylon spandex with copper bearing filament |
| Construction | Interlock Knit (a double-bed interlock knit) |
| Weight | 270 GSM |
| Width | 155 cm |
| Function | UPF 50+ Sun Protection — blocks ultraviolet radiation for outdoor training |
| Performance target | UPF rating above 50 with UVA below 5% |
| Test method | AATCC 183 ultraviolet transmittance |
| Additional value | protection held after 40 washes and in the wet state |
| Stretch | Four-way, recovery above 92% |
| Certification | OEKO-TEX Standard 100, REACH compliant inputs |
| MOQ | 300 m per colour |
| Lead time | 20–25 days after approval |
Why this construction works
Because a double-bed interlock knit is used, the fabric behaves consistently across the roll: identical faces on both sides, so the fabric stays opaque under tension. That consistency is what lets a factory cut confidently and lets a brand repeat an order a season later with the same result.
Interlock Knit construction shown at close range
Performance features
- UPF 50+ Sun Protection: blocks ultraviolet radiation for outdoor training, measured by AATCC 183 ultraviolet transmittance.
- Hand and comfort: antibacterial action plus faster heat transfer away from the skin.
- Construction benefit: identical faces on both sides, so the fabric stays opaque under tension.
- Consistency: GSM and width tolerance are locked per lot and recorded on the inspection sheet.
- Durability: performance is verified after repeated washing, not only as delivered.
Recommended applications
Used for Base Layers and for the accessories around them. next-to-skin comfort with continuous moisture movement is the reason it is chosen, and the fabric bonds, prints and sews on standard machinery without special settings.
UPF 50+ Sun Protection fabric prepared for Base Layers production
Dyeing, finishing and customisation
The fabric can be supplied greige, piece dyed or printed. Add-on finishes are selected after a wash durability trial, because a finish that disappears after five washes is worse than no claim at all.
Care instructions
- Machine wash at 30 degrees with mild detergent, no fabric softener.
- Dry away from direct heat and do not tumble dry hot.
- Cool iron on the reverse if needed, and avoid bleach.
Ordering, sampling and quality control
Minimum trial order is 300 metres per colour and bulk production takes 20-25 days once the approval sample is signed. Documentation includes test reports per lot, OEKO-TEX conformity and full construction sheets.
Roll inspection and packing before shipment
Frequently asked questions
Is the performance tested on every lot? Yes. The named test method is repeated on bulk fabric, not only on the approval sample, and the report carries the lot number so results can be traced back.
Can the weight and width be changed? Yes. Most programmes run between 140 and 340 GSM, and width can be set between 150 and 180 cm to match your marker. Changing weight changes cover and stretch, so we re-test before confirming.
