Swiftly Tech Short Sleeve (Seamless Swiftly, $68–$78 retail) is one of the most copied lululemon pieces. Seamless construction with no side seams; a small 'Swiftly Tech' print inside the collar. This guide walks through the tag, fabric, construction and hardware checks we run on every piece.
The inside tag
The inside tag must say 'Seamless Swiftly' or the fabric family that matches Swiftly Tech Short Sleeve. Printing is crisp and the tag is heat-pressed on recent pieces. A sewn-in care label at the waist or collar on a recent piece is a warning sign.
Fabric and construction
A seamless, lightweight running tee with silverescent anti-stink technology. The 2.0 version has a slightly different fit.
Seamless construction with no side seams; a small 'Swiftly Tech' print inside the collar.
Resale value once verified
Year-round seller; race-length versions sell slightly higher.
Grade A pieces list at 45–65% of lululemon retail on Poshmark and eBay and sell fastest.
Buying authenticated stock in bulk
ThriftUp sells Swiftly Tech Short Sleeve inside tops & tanks bundles and, for common styles, as single-style lots from 100 pieces. We check seamless tops for snags and runs, and cotton tops for underarm discoloration.
Read next
- How to Authenticate lululemon Pace Breaker Shorts
- Grade A vs. Grade B lululemon Tops & Tanks: What to Expect
- How to Read a Wholesale Packing List
Pricing and fee figures are indicative and change; check current platform terms. ThriftUp is not affiliated with lululemon athletica.
Frequently asked questions
Where can I buy the stock discussed in this guide?
ThriftUp sells graded A/B pre-owned lululemon from 100 pieces; message us on WhatsApp with your quantity and categories.
How current is this guide?
Updated 2026-10-13. Resale prices and platform fees are reviewed regularly.