The Responsiv MP+ is a lightweight, waterproof and breathable jacket with enough stretch to keep you comfortable. Designed specifically for races when there's a mandatory kit list required.
Raidlight says:
The Responsiv MP+ Jacket is waterproof and highly breathable. A versatile and lightweight jacket that provides exceptional comfort using 2 Layer Responsiv MP+® membrane for durability and comfort. Featuring a fully adjustable protective hood with stiffened peak. The perfect jacket for training and racing in bad weather.
Raidlight's Responsiv MP+ Jacket is a lightweight, stretchy waterproof jacket tat is ideal for running. The main body is made from a lightweight full stretch fabric which feels okay next to your skin compared to other running jackets. It's important to note that the jacket has a waterproof membrane, not coating, meaning it's more breathable than waterproof in certain areas and vice versa in the areas needed.
It's not the lightest waterproof out there and this is in part down to the number of practical features in the design. Two hand pockets, thumb loops, three-way adjustable hood with a stiffened peak which is a real upgrade on many lightweight elasticated hoods. A unique feature is the watch window on the left sleeve - only useful if you're a lefty though. The jacket packs down small into it's own pocket so it doesn't take up much space in your pack.