Built for mechanics who put their bodies to work every day, this OPP Optimized Peptide Power shirt represents strength, recovery, and endurance in the shop and beyond. Featuring a bold mechanic-inspired design with crossed wrenches, piston power, and the unmistakable tagline “Load Up. Recover. Repeat.”, this shirt is made for those who keep machines running and jobs moving.
OPP stands for Optimized Peptide Performance, a brand built around the mindset of working hard, recovering smarter, and coming back stronger. This design references commonly discussed peptides such as CJC-1295, Ipamorelin, BPC-157, and TB-500, which are frequently talked about in fitness, recovery, performance science, and biohacking communities.
Perfect for auto mechanics, diesel mechanics, heavy equipment mechanics, machine operators, tradesmen, and blue-collar workers who rely on physical performance and recovery. Whether in the garage, on the job site, or in the gym, this shirt represents grit, resilience, and a science-driven recovery mindset.
A great gift for mechanics, trades workers, peptide enthusiasts, biohackers, science geeks, and anyone who lives by the rule: Load up. Recover. Repeat.
The relaxed cut sits comfortably during post-lift cooldowns or weekend projects. Garment-dyeing gives each shirt subtle tonal variation so the design feels integrated with the fabric, not slapped on. Wear it to the gym, the garage, or a recovery session — it reads like a statement from someone who tracks progress, tweaks variables, and keeps coming back.
Features:
- Heavyweight 100% ring-spun US cotton with a soft, garment-dyed finish
- Relaxed fit with pre-shrunk tubular knit for fewer side seams and cleaner drape
- Double-needle stitched seams for durability through frequent wear
- Available S–4XL with 58 color options and sewn-in label
- Made in Honduras; consult Comfort Colors 1717 size chart for exact sizing
Product features
- 100% ring-spun US cotton, heavyweight (6.1 oz/yd²)
- Garment-dyed finish for soft color and texture
- Tubular knit (no side seams) and relaxed, pre-shrunk fit
- Double-needle stitching on all seams for durability
- Available S to 4XL (select partners); 58 colors; sewn-in label
Care instructions
- Machine wash: cold (max 30C or 90F)
- Do not bleach
- Tumble dry: low heat
- Iron, steam or dry: low heat
- Do not dryclean
EU representative: HONSON VENTURES LIMITED, gpsr@honsonventures.com, 3, Gnaftis House flat 102, Limassol, Mesa Geitonia, 4003, CY
Product information: Comfort Colors® 1717, 2 year warranty in EU and Northern Ireland as per Directive 1999/44/EC
Warnings, Hazard: Made in Honduras
Care instructions: Machine wash: cold (max 30C or 90F), Do not bleach, Tumble dry: low heat, Iron, steam or dry: low heat, Do not dryclean
