Camera bag recommendation

How is that possible? Do they not have a zip closure or something?

http://www.google.co.uk/products/catalog?q=lowepro+slingshot&oe=utf-8&rls=org.mozilla:en-GB:official&client=firefox-a&um=1&ie=UTF-8&cid=7432272124147669556&ei=kcj5Sc73KIqZjAetx5SSAw&sa=X&oi=product_catalog_result&ct=result&resnum=1#ps-sellers

I have one like this.. shoulder bag that can be converted to back pack or belt bag..
http://www.waltersphotovideo.co.uk/products/lowepro-s-f-specialist-80-aw/7902/?source=froogle&utm_source=froogle&utm_medium=comparison_shopping_feeds&utm_nooverride=1

Thy have a velcro flap with straps and clips, I find they work quite well.