Salomon Sense Pro 5 Set Hydration VestSalomon knows that every second counts and that comfort and convenience make all the difference in a trail marathon or shorter outing. That's why the minimalist Sense Pro 5 is ultra comfortable with no friction points and a really precise fit. With instant access to your trail essentials, you can push on further and faster. Material Back body: 100% Polyester Back insert: 89% Polyamide, 11% Elastane Body insert: 88% Polyamide, 12% Elastane Body: 87%