Nylon 66 High Tenacity Spandex UPF 50+ Sun Protection Interlock Knit combines nylon 66 filament with high tenacity spandex with a Interlock Knit construction. It is aimed at Yoga Sets that require a soft hand with modest, sustained stretch, and the reason is straightforward: higher melt point and better abrasion resistance for demanding uses, so UPF 50+ Sun Protection.

Nylon 66 High Tenacity Spandex 240 GSM Interlock Knit, face view
Key specifications
| Parameter | Value |
|---|---|
| Fabric name | Nylon 66 High Tenacity Spandex UPF 50+ Sun Protection Interlock Knit |
| Composition | nylon 66 filament with high tenacity spandex |
| Construction | Interlock Knit (a double-bed interlock knit) |
| Weight | 240 GSM |
| Width | 175 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
Performance comes from three decisions: the yarn, the stitch and the finishing route. nylon 66 filament with high tenacity spandex supplies the base behaviour, a double-bed interlock knit sets how air and moisture move, and finishing is kept deliberately light so the attributes survive washing.

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: higher melt point and better abrasion resistance for demanding uses.
- 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
Specified mainly for Yoga Sets, and suited to any programme where a soft hand with modest, sustained stretch is written into the brief. Designers use the same base for matching styles, which keeps colour continuity simple across a collection.

UPF 50+ Sun Protection fabric prepared for Yoga Sets production
Dyeing, finishing and customisation
Dyeing runs on a controlled recipe with consolidated dye lots to hold shade continuity. Finishing options include wicking, antibacterial, soft touch and anti-pilling, applied after lab trials so the hand approved in sampling is the hand delivered in bulk.
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
Sampling is fast: A4 hand feel cards, laboratory dips and a 5 metre trial roll within a week. Bulk runs in 20-25 days, with inline inspection and a final random inspection before packing.

Roll inspection and packing before shipment
Frequently asked questions
Can we get recycled content with this construction? In most cases yes. GRS certified recycled nylon or polyester can replace the virgin yarn with full chain of custody documents, usually with no visible change in hand or performance.
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.