100% cotton short sleeve in black with the chemical structure for THC in 3M reflective on the shirt body.
Tetrahydrocannabinol (THC), or more precisely its main isomer (−)-trans-Δ9-tetrahydrocannabinol, is the principal psychoactive constituent (or cannabinoid) of cannabis.
The chemical responsible for most of marijuana's psychological effects, it acts much like the cannabinoid chemicals made naturally by the body, according to the National Institute on Drug Abuse (NIDA).
Scotchlite reflective material by #3M is composed of wide angle, exposed retroreflective lenses bonded to a heat activated adhesive. Certified to the current editions of ANSI/ISEA 107 and CSA Z96 high visibility safety apparel standards.