The material is 4-way stretch with additional stretch mesh panels. On the back there is a zippered pocket for gel or for storing keys, phone, etc. The shorts material contains a DWR coating that provides temporary water resistance. Inside are lightweight elasticated trousers with a leg. The drawstring waist is made with an elastic strap that is inserted into the cross, so you never get the end of the drawstring stuck in the holes. The elastic strap is also much more sensitive to the waist. Reflective print around the entire circumference of the shorts will be appreciated when returning at night. A great choice for long runs in the countryside.