Polyester Spandex Bamboo Charcoal 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 polyester spandex with charcoal loaded filament, which gives permanent odour adsorption built into the yarn rather than the finish. The result is a fabric that delivers UPF 50+ Sun Protection in daily use rather than only in a laboratory.
Polyester Spandex Bamboo Charcoal 280 GSM Interlock Knit, face view
Key specifications
| Parameter | Value |
|---|---|
| Fabric name | Polyester Spandex Bamboo Charcoal UPF 50+ Sun Protection Interlock Knit |
| Composition | polyester spandex with charcoal loaded filament |
| Construction | Interlock Knit (a double-bed interlock knit) |
| Weight | 280 GSM |
| Width | 165 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
The construction does the work before any chemistry is added. a double-bed interlock knit means identical faces on both sides, so the fabric stays opaque under tension, and that structure is what allows the fabric to blocks ultraviolet radiation for outdoor training under the conditions Base Layers actually face.
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: permanent odour adsorption built into the yarn rather than the finish.
- 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
The first choice for Base Layers, where next-to-skin comfort with continuous moisture movement is the requirement that decides the fabric. It also converts cleanly into coordinated pieces in the same programme, since the hand and the shade run together.
UPF 50+ Sun Protection fabric prepared for Base Layers production
Dyeing, finishing and customisation
Available in piece dyed, yarn dyed or sublimation ready form. Functional finishes such as moisture management, antibacterial, anti-pilling and UV absorption can be applied individually or combined, and each is verified against its test method before bulk release.
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
Trial quantity starts at 300 metres per colour with laboratory dips in five working days. Bulk lead time is 20-25 days after approval, and every lot ships with a test report, a shade check and an inspection record.
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 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.
