I finally received the Basecamp sliding visor helmet. I ordered it thru Ebay ($36.99 plus $3.00 shipping) vs Amazon ($54.84) as it was cheaper; however it took over 3 weeks to arrive from China. The removable visor Basecamp helmet weighs in at 291 gms w/visor attached and the sliding visor Basecamp helmet, the pink one, weighs 285 gms. The sliding visor comes with three different visors, gray, yellow and metallic (flash). The sliding visor works well and is easy to remove and change out between the other visors. The sliding visor is shorter than the removable visor and covers less of your face. The sliding visor helmet is somewhat longer and more bulbous in the front, making it less aero in my opinion, than the removable visor helmet. My major complaint with the sliding visor helmet is that it will not clear my glasses, so I cannot wear my glasses while wearing this helmet. The removable visor helmet however works well with my glasses. The metallic (flash) colored visor works great in bright sunlight, better than any other colored lens or visor that I have used. One unusual thing that the sliding visor helmet has is the chinstrap lock. I have included photos, it has a clicking mechanism, similar to some I have seen on some bike shoes. Please note that I purchased the sliding visor helmet in the "hot pink" color for my wife. I quit wearing that color many years ago. LOL Both helmets are very adjustable, as my wife has a small head, and I have a large head (due to such a huge brain, I am sure) and we are both able to wear either helmet.