Lightweight yet tough AFO-Vent is a durable, 4-way stretch nylon fabric that is abrasion resistant, retains its shape, resists odors, wicks moisture + dries quickly Perforated venting Micro-perforations enhance breathability Minimal trims, pack compatible Low-profile, mini-binding collar + armholes provide smooth, flat lying comfort to optimally accommodate hydration vests or packs Smooth finish Bonded hemline provides an anti-chafe, clean finish Stay seen Janji signature reflective logo on front chest + “watermark” reflectivity on back increase visibility in low light AFO-Vent 80% nylon, 20% elastane