BCA Float E2 Avalanche Airbags

The BCA Float E2 is the current generation of Backcountry Access's avalanche airbag system, and the version we stock at Twelve Board Store in Richmond. Backcountry Access has been building avalanche safety equipment since 1994 — beacons, probes, shovels, radios and airbag packs used by riders, guides and ski patrollers worldwide — and the Float E2 represents the most refined version of their airbag platform to date. The defining feature is the Alpride E2 supercapacitor engine, developed with Alpride specifically for cold-weather backcountry use. Traditional airbag packs store energy as compressed gas in a cylinder. That cylinder is heavy, temperature-sensitive, single-use until refilled, and a genuine problem to travel with. The E2 replaces it with a supercapacitor that stores energy electrostatically and drives a compressor to inflate the 162-litre dual-lobe airbag. You charge it over USB-C from any outlet, it re-arms in seconds rather than requiring a refill, and two AA batteries carried in the pack provide backup deployments in the field if the charge runs down. For Australian riders who travel to Japan, New Zealand or North America, the travel implications matter as much as the performance ones. Under IATA and US DOT classification the E2 system is treated as a capacitor with energy storage of 10 Watt-hours or less, which places it outside the compressed gas rules that govern canister-based airbags. In practice that removes the dangerous goods paperwork, the canister removal step, and the risk of being turned away at a check-in desk with a cylinder in your bag. Airline policies do vary, so confirm with your carrier before you fly. The E2 engine is 40% smaller and 11% lighter than the earlier Alpride E1 system it replaces. The size reduction is the more meaningful figure for most riders: a smaller engine means a lower-profile pack that sits closer to your back, which changes how the pack rides on a traverse or a bootpack far more than the weight saving does. Three pack sizes share the identical airbag and engine. The Float E2-25 at 25 litres is the volume most backcountry snowboarders and ski tourers should be looking at, carrying a full day's kit without the bulk that gets in the way on heli days and sidecountry laps. The Float E2-35 at 35 litres adds internal shovel and probe carry, A-frame ski carry, compression straps and a fleece-lined goggle sleeve, which is the configuration splitboarders and snowmobilers tend to want for longer objectives. The Float E2-45 at 45 litres is the professional pack, with an expandable roll top, a quick-cinch lid for repeated access through a working day, and a dedicated snowsaw compartment. Both the E2-25 and E2-35 come in S/M and M/L torso lengths. We want to be direct about what an airbag does and doesn't do, because we think that honesty is part of selling safety gear properly. Airbag packs work on the principle of granular convection: in a moving avalanche, larger objects rise toward the surface. Deploying a 162-litre airbag dramatically increases your effective volume, which reduces burial depth and improves survival odds. The research supports this. What the research does not support is treating an airbag as insurance. It does not prevent trauma against trees or rocks, it does nothing if it isn't deployed, and it does not compensate for poor terrain choices. An airbag is the fourth layer of a safety system whose first three layers are avalanche education, conservative terrain selection, and carrying and knowing how to use a beacon, probe and shovel alongside a partner competent to perform a rescue. If you are buying your first airbag pack, complete an AST 1 course before you rely on it, and check the Mountain Safety Collective forecast before every tour.