Second His Mellow Mood sweater.

My husband chose this new green color “Moss Green” of Drops Nepal. I tried suggesting some calm colors like gray, beige, or white, but he opted for this vivid color. Ask and he shall receive :)

Your sentence is clear and descriptive. However, for precision, you might consider the following revision:

I quickly knitted size L, thanks to my interchangeable needles and a new trick: using a smaller needle size (4.5 mm) in my left hand and 5.5 mm in my right hand. This made the stitches slip off the needle effortlessly.