Airblaster says:

The classic that started it all, and still the best long underwear on the planet! If you have never owned an Airblaster Ninja Suit, you truly are missing out. I would say that on an average winter day, you are about 60-70% as comfortable without a Ninja Suit as you would be with one. That extra 30-40% comfort that you pick up when you put on your Ninja Suit means more runs, more smiles, more miles, more FUN! You really need to try one to believe how great and wonderfully addictive the Airblaster Ninja Suit is! There is a really good reason why people refer to it as the best long underwear on the planet.

Ninja Suit Features:

Air-Tech 4-way stretch wicking fabric

7-panel ergonomic hood to seal out drafts and snow

Full-length front chest zip

Womens specific fit

Circumferential waist zip for ultra-easy #2 access

Thumb loops at wrist cuff to seal out snow