The S3 is the middle size in the S Series range. Its moderate size makes it a very flexible product - for example you could carry a mirrorless camera and still have room for several lenses and a small flash gun or carry something bigger like a DSLR just a single lens and a couple of small accessories. We even include two soft padded Velcro® dividers for you to separate your equipment. Of course it also includes the other features common to the S-Series like two quick release Clogball fastenings that allow you to open the main covering flap with just one hand, a the zip on the main compartment with two zippers to open from either end or the full length front dump pocket for a phone or roll of film. As always each feature thought out so that not only does the camera fit into your Billingham, but also so that the Billingham fits into your life. And this thinking extends further into the design, the TukTop feature means that both sides of the main zipper can be tucked behind the bag's internal front and rear dividers, allowing you to pull equipment in and out of the bag easily while shooting. Those internal padded dividers also create two thin pockets inside the main compartment, suitable for a travel guide or camera batteries - this in addition to the discrete zippered pocket on the back of the bag ideal for passports, memory cards etc. Of course like all Billingham camera bags it is made with 3 layer waterproof fabric to protect your possessions during a downpour. Additionally to protect from bumps and knocks the main compartment is padded on all four sides and has a removable 25mm, fabric covered, deep foam base. The S3 may be a new bag but years of experience have gone into the design of every feature, and quality English craftsmanship into its construction.