The original Pro SL Prima Loft Gilet was a game changer bringing technical hollow fill insulation to the performance cycling market in the form of a versatile packable gilet. The updated version the Pro SL Prima Loft Gilet II is even better with enhanced breathability stretch & an updated contemporary design. Lightweight Insulation Two different types of Primaloft fill have been used. 80g of Prima Loft Gold has been used on the front torso maximising insulation exactly where you need it most. 60g of Prima Loft Silver Active has been used on the back giving enhanced breathability & accomodating some stretch to create a great fitting garment. Prima Loft Insulation Prima Loft insulation boasts an exceptional warmth to weight ratio tiny pack size extremely breathable construction & is highly water resistant making it a tremendously versatile performance insulator. Lightweight windproof shell panels with Prima Loft GOLD insulation PFC-Free non-toxic durable water repellent finish Stretch insulated back for unrestricted movement Triple rear pocket system with zipped security pocket Lightweight internal hem elastic with silicone gripper Subtle reflective details 90 Day Satisfaction Guarantee Construction Nylon 60% Polyester 35% Elastane 5%