*ALL SALES FINAL - NO REFUNDS OR EXCHANGES DUE TO POTENTIAL CONTAMINATION*
MATERIAL: Lightweight, durable, soft and comfortable outdoor mask is well built with diving fabric. The activated Charcoal filtration could protect against dust and keep warm.
POWERFUL FUNCTION: which can filter 95% of dust, vehicle and industry exhaust, pollen allergy, chemicals, fumes and particulates. and the two valves design act as blockers to the air, which help to achieve the effects of high altitude&low air concentration condition. This will increase the efficiency of your lung capacity training to some extent.