The 306 features the Billingham PressTop which gives maximum access to the bag. Carbon fibre rods in the top gusset provide a light weight stiffeners allowing improved access to the main compartment. Carbon fibre will flex but won't bend and get misshapen. The 306 is constructed using Softweave canvas with Billingham StormBlock protection. Much the like 335 in size but without the large front pocket, making it more compact. The 306 also has SuperFlex partions the 8-15, 9-15 and flap, a zippered back pocket, military spec. webbing throughout, chunky leather shoulder pad, 2-way grab handles and brass fittings The 306 is great for a medium kit of either 35mm or medium format but two front pockets offer space for accessories and optional AVEA side pockets can be added for more space.