STIO Men's Vests

Frequently Asked Questions

• Which Stio vest is best for wet or damp conditions: down or synthetic?

  Synthetic-insulated vests like the Azura (PrimaLoft Gold 60g recycled) and the Fernos (PeakFill Active 40g) retain warmth when wet and dry faster than down, making them better for damp climates or sweaty aerobic use. Stio’s Pinion Down Vest uses 800‑fill HyperDRY treated down for improved water resistance and packability, so choose down if you prioritize compressibility and maximum warmth in mostly dry conditions.
• What Stio vest should I pick for high‑output activities like running, cycling, or skins touring?

  For aerobic efforts look to ultralight, breathable styles such as the Second Light windshell or the Fernos Insulated Vest with PeakFill Active 40g, which balance wind protection with moisture management and stretch. Their low bulk and quick‑dry fabrics maintain mobility and prevent overheating during sustained exertion.
• How should a Stio vest fit if I want to layer it for hiking and skiing?

  Aim for a trim, athletic fit that allows a baselayer plus a light midlayer without restricting shoulder or arm movement; Stio’s Pinion and Azura are cut to be streamlined for mobility while still accommodating a midlayer. Use the brand’s size chart as a guide—example: a Medium generally fits a 38–40" chest on a 5'10", 163 lb frame—then size up if you wear thicker insulating layers.
• Are Stio vests treated for weather resistance and are they PFAS‑free?

  Most Stio vests feature a PFAS‑free DWR to shed light precipitation and wind while maintaining breathability, reflecting the brand’s PFAS‑free commitment beginning in 2024. Shell fabrics (Pertex Quantum–style or reMeridian recycled nylon) and water‑resistant treatments improve performance in light wet weather, but these vests are not fully waterproof—use a hard shell for prolonged heavy rain.
• How does the Pinion Down Vest compare to the Azura Insulated Vest?

  The Pinion is an 800‑fill HyperDRY down vest optimized for maximum warmth-to-weight and compression (around 8 oz), making it ideal for cold, dry conditions and layered systems. The Azura uses recycled PrimaLoft Gold synthetic insulation (~9 oz) for reliable warmth when damp, faster loft recovery, and better performance in wet or high‑moisture environments; choose Pinion for packable warmth, Azura for wet‑weather versatility.