40 g / sq m 100% Nylon Ripstop
70 g / sq m 100% Polyester Mesh Knit
Here's what other sites are saying:
The North Face Hydrogen Vest is a super lightweight vest ideal for endurance running, or other fast and light excursions, the Hydrogen Vest features a nylon ripstop fabric on the front and a full mesh panel on the back for optimal breathability. Reflective graphics and logo increase visibility, and elasticized armholes and hem keep vest in place while you re on-the-go. Stowable in its own chest pocket, this vest is compact for travel.Hydrogen Vest Features:Features Performance fitUltralight nylon ripstop fabric with full back mesh panel for breathabilityReflective graphic and logosNapoleon chest pocketElasticized armholes and hemVest stows in Napoleon chest pocket with cinch clip systemStyle Number: ABVU Specifications:Avg Weight; 680 g (2.4 oz)Length from Center Back: 28''Fabric shell a: 20D 40 g/m2 (1.2 oz/yd2) 100% nylon ripstop with PU kiss coatFabric shell b: 63 g/m2 (1.9 oz/yd2) 100% polyester knit mesh
- Mountain Hideaway refers to the men's version
Seemingly as light as the gas for which it was named, The North Face's Hydrogen Vest provides weather protection in a mere 2.5 ounces. Tightly woven nylon fabric with a thin PU coating protects you from wind and rain and a full mesh backpanel provides plenty of ventilation so that you can consistently dump heat when you're moving fast.
- Mountain Gear refers to the men's version
With an atomic number of just one, hydrogen is the lightest element in the universe. And weighing in at just 2.5 ounces, The North Face Hydrogen Vest is the lightest top in your arsenal. Made of wind-resistant nylon, this vest provides light insulation for your pre-dawn run around the neighborhood or for your ultralight through-hike. The Hydrogen has reflective logos to keep you visible in in the early morning hours, and, once the sun comes up and warms your body, mesh side panels let heat exit before it ruins your workout.
- Backcountry.com refers to the men's version
On Sale. Free Shipping. The North Face Men's Hydrogen Vest DECENT FEATURES of The North Face Men's Hydrogen Vest Hybrid construction Sub-3 ounces Zipper pocket Reflective logos The SPECS Source: Imported Average Weight: 2.5 oz Body: 40 g/m2 100% nylon ripstop, Panels: 70 g/m2 100% polyester mesh knit This product can only be shipped within the United States. Please don't hate us.
- Moosejaw refers to the men's version
An ultra lightweight, wind-resistant vest designed with breathable mesh knit panels at back and along sides. Performance fit design rests flush for ideal aerobic use, including a shaped collar that's angled away from chin to eliminate mid-stride abrasion.
- The North Face refers to the men's version