Callsign Greybeard shows how to install the Pyramex V2G-Plus Integrated Airflow Adapter to a Valken Siera... "Instruction video for installing the Valhalla Airsoft Integrated Airflow Adapter into a Valken Sierra or Pyramex V2G-Plus (including prescription inserts). Watching this instruction video is important to properly install securely and safely into your goggles."

Vytac got this howto video to show you how to properly fix the Valken Sierra Goggles... "In this video, I will show you the modifications I did on my Valken Sierra Goggles. The goggles did not go by their promises, one of them being that they fog while they have thermal glasses. The problem was that the goggles had a lack of ventilation. I solved this problem by soldering several holes on the top and bottom that still are too small to make a bb go through and safe enough.

Another product feature video from Valken Tactical, with Kaiju showing the Valken Airsoft Sierra Goggles. According to its product description it features a TPU frame that has excellent resistance to cold and heat and provides a perfect facial seal. It has a special indirect ventilation system located at the top and bottom of frame allow air flow & heat release.

The 5.11 Sierra Softshell in Battle Brown colour is available now at Military1st.co.uk... "Made of 100% polyester stretch fabric bonded to polyester micro fleece, 5.11 Sierra Softshell offers lightweight all-weather protection. Featuring DWR water-repellant finish, low profile chest pockets & lined handwarmer pockets, along with 5.11 RAPIDraw system it's ideal for both on & off duty tasks.