Here's our good friend and partner Adrian Ballinger preparing for his oxygen-less attempt on Everest from the Northside (Tibet) with Cory Richards. Adrian has already summited Everest 6x but this will be his first without the use of supplemental O2. Using the Head Tent has allowed Adrian to maintain his aggressive pre-acclimatization schedule without having to infringe on his partner's sleep. Adrian's company Alpenglow Expeditions leads RapidAscent expeditions around the world - cutting trip itineraries in half and improving safety by pre-acclimatizing using our technology. Good luck to him and Cory in their climb!