At 175 grams in a size medium, Q36.5's Gregarius Pro Bib Shorts weigh about as much as a couple of energy gels. That kind of weight disappears on your body, and it's no accident — the 2025 redesign rebuilt these bibs from the ground up using 4 proprietary fabrics and minimal stitching to create what Q36.5 calls an ergogenic pattern. The construction uses a blend of recycled polyamide, elastane, polyethylene Dyneema, and polyester, with all yarns sourced from 100% recycled materials. The result is a bib short that moves with you rather than resisting your pedal stroke, which is exactly what you want on a 5-hour training ride when every bit of restriction compounds into fatigue.

The Q LAB Air Chamois is where the Gregarius Pro separates itself from the crowd. Instead of a single bonded pad, Q36.5 built a dual-layer system where the cover fabric and the C-shaped foam pad move independently. That means the chamois conforms to both your body and your saddle shape simultaneously, reducing the friction that typically builds up between rider and pad over long distances. The foam pad is inserted directly into the pattern of the shorts rather than stitched on top, which creates a single uninterrupted plane from the straps through the groin. No seam ridges, no bulk transitions — just a continuous surface that stays planted when you shift position on the saddle. If you've dealt with a chamois that bunches or migrates during seated climbing, the integrated construction addresses that problem directly.

Behind the shorts, a lumbar support panel made from high-density woven fabric creates a compression zone across the lower back and glutes. This X-shaped panel hugs the musculature in the lumbar and gluteal region, and while the muscle-support claims are hard to quantify, the sensation of stability through the hips and pelvis is real — you can feel the panel working during hard, out-of-the-saddle efforts. The raw-cut leg hems skip silicone grippers and elastic bands entirely, relying instead on a textured material that grips the thigh without any of the pressure points or circulation issues that conventional bands create. They stay put during riding without leaving marks on your legs afterward.... Read More