88% Polyester 12% Spandex UPF 50+ Sun Protection Interlock Knit is a double-bed interlock knit developed for Base Layers where next-to-skin comfort with continuous moisture movement decides whether a style succeeds. The base is 88% polyester filament / 12% spandex, which gives the workhorse blend for training ranges that wash repeatedly. The result is a fabric that delivers UPF 50+ Sun Protection in daily use rather than only in a laboratory.
88% Polyester 12% Spandex 280 GSM Interlock Knit, face view
Key specifications
| Parameter | Value |
|---|---|
| Fabric name | 88% Polyester 12% Spandex UPF 50+ Sun Protection Interlock Knit |
| Composition | 88% polyester filament / 12% spandex |
| Construction | Interlock Knit (a double-bed interlock knit) |
| Weight | 280 GSM |
| Width | 170 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: the workhorse blend for training ranges that wash repeatedly.
- 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
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.
What is the minimum for a first order? Development starts at 300 metres per colour, which is enough for a proper wear trial and a small capsule. Bulk pricing improves at 1,000 metres and above per colour.
